Nucleus Coffee Tools

Building on NucleusCoffee Tools’ reputation for precision and innovation, Bloom redefines brew bed preparation with a focus on control, clarity, and adaptability.

At its core, Bloom helps eliminate inconsistencies in the coffee bed, improves saturation, and optimizes extraction — all while empowering you to brew with greater precision, intention, and confidence.

Designed for brewers who value consistency and ease of use, Bloom integrates multiple functions — from deep distribution to surface refinement and bloom shaping — into a single, compact tool that enhances extraction across any brew method.

Whether you're working with a conical pour-over, flat-bed dripper, immersion brewer, or even an espresso basket, Bloom adapts seamlessly to your method — giving you the consistency and clarity you need to brew exceptional coffees at its full potential.

Dual Needle Distribution: Precision meets control

Bloom features a two-in-one needle system that includes both Straight and Fan Needle configurations, each designed to address specific challenges in filter coffee preparation.

With a simple twist of the end of the Bloom – the FlowTip – users can switch between needle types, or fully retract the needles for safe storage.

Straight Needle Mode

Reaches the bottom of the brew bed, ideal for conical brewers like V60s. It breaks up clumps, redistributes density, and eliminates air pockets that can lead to uneven flow or ‘choking’. The result is a more uniform extraction from the deepest part of your coffee bed.

Fan Needle Mode

Gently combs the surface, lifting chaff, boulders and other non-soluble particles to the top layer. Assists with lateral fines migration (over vertical), improving drainage, preventing blockage during drawdown, and improving surface evenness. This wider agitation also improves flow control and bed structure across larger brew beds.

Key Differences: titanium nitride coated needles

Most WDT tools look similar. The Nucleus Bloom performs differently -- and it starts with what the needles are made of.

Each needle is titanium nitride (TiN) coated, making them 8x harder than standard stainless steel. That means they resist bending and wear through thousands of doses, holding their shape and precision long after cheaper alternatives have dulled.

But hardness alone isn't enough. The TiN coating also creates a low-friction surface that glides through your grounds without disrupting the bed structure -- distributing evenly, not aggressively.

And because static is the silent enemy of clarity, the Nucleus Bloom's needles absorb 20% more static charge than stainless steel, actively lifting fines and chaff so they don't end up in your cup.

Harder. Smoother. Smarter. The needle was engineered to do more, so your espresso can be more.

Spare needles are also available for separate purchase, and the Bloom can also be disassembled to customize the number or configuration of needles — offering true adaptability for different doses, brewers, or grind profiles.

The FlowTip Difference

FlowTip: Better bloom, better cup

On the reverse side of the tool, Bloom features a FlowTip — a shaping device that helps create a consistent divot in the coffee bed before pouring.

Often, brewers unknowingly pour water onto an uneven coffee bed — one where the depth of the centre is deeper than the edges. This irregular depth leads to uneven saturation, trapping gas in pockets that cause bubbling, turbulence, and poor CO₂ release. As water begins to draw down, it follows the path of least resistance, bypassing parts of the coffee and leading to subtle but significant channeling.

The FlowTip addresses this by creating a deliberate, central divot in the

This helps to even out both the horizontal and vertical bed depth, promoting uniform contact between water and coffee from the very start. T The result is smoother blooming, more consistent swelling across the bed, and a stable structure that enhances saturation and minimises channelling.

This intuitive tool plays a crucial role in creating structural consistency during the bloom phase of filter coffee brewing, particularly for conical drippers. By encouraging a more balanced and controlled bloom, the FlowTip makes it easier for brewers to achieve repeatable, high-quality extractions — no matter their pour technique or dripper type.

More than a WDT

More than a simple needle or WDT tool, Bloom is the missing piece in coffee brewing workflow. It’s intuitive, portable, and built for versatility, equally at home in cafés, at competitions, or on your kitchen bench.

The core features of the Bloom include: 

• Titanium nitride (TiN) coated needles 
• Extra and replacement needles 
• Custom needle configuration 
• Straight and Fan needling modes 
• FlowTip attachment for brew bed depth consistency 
• Easy twist for needle retraction

At its core, Bloom helps eliminate inconsistencies in the coffee bed, improves saturation, and optimizes extraction — all while empowering you to brew with greater precision, intention, and confidence.

The Paragon is for the cup you’ve been brewing toward, where nothing is lost on the way down.

There is a moment in every pourover, somewhere between the first bloom and the final draw, where the coffee is doing exactly what it should. The aromas rise. The extraction is alive. The Nucleus Paragon Pourover Stand was built to make sure all of it reaches your cup.

Heat releases aroma volatile compounds into the air around your brew rather than into the liquid you’re drinking. It’s a quiet, consistent loss, and one the Paragon was designed to address. Sitting beneath your pour over dripper, it chills the brew as it falls through the Paragon Chilling Rock, intercepting the extraction at the exact moment volatile compounds are most vulnerable. The florals, the brightness, the complexity, held in the cup where they belong.

Brewing With Intention, Down to the Physics

Nucleus Coffee Tools developed the Paragon in collaboration with the Zurich University of Applied Sciences (ZHAW), one of Europe’s leading applied science institutions and home to the Coffee Excellence Centre. Their research team studied the direct relationship between brew temperature and volatile aroma compound preservation, measuring real sensory outcomes in the cup under controlled conditions. That research shaped every design decision in the Nucleus Paragon: the geometry of the chilling rock, the thermal properties of its core, the position of the stand.

The result, as confirmed by ZHAW’s research, is up to 40% more aroma volatile compounds preserved compared to an identical pour over brew made without extract chilling. Flavor you taste, not lose to the room.

The Stand

Three adjustable tiers, each with a clear purpose.

The top tier of the Nucleus Paragon Pourover Stand holds your single-server pour over brewer of choice. It is compatible with conical drippers including the Origami Dripper and Suprima Instrument SD-1R, as well as flat bottom brewers like the Solo Dripper and April Brewer. The middle tier cradles the Paragon Chilling Rock, positioned precisely in the brew path where the extract chilling process takes place. The bottom tier holds your server, catching every drop.

All three tiers are fully adjustable to accommodate different pour over brewing equipment and server sizes. The Paragon Pourover Stand is also compatible with most pour over brewing scales, sitting flush on the base without obstruction.

What's in the Box

The Nucleus Paragon arrives in an all-black, minimalist box, quiet and considered, like the brew it supports. Two simple inscriptions on the exterior are all it takes.

–      Nucleus Paragon Pourover Stand  x 1

–      Nucleus Paragon Chilling Rocks  x 2

All parts of the Nucleus Paragon Pourover Stand + Chilling Rocks is produced with food safe materials. Read more here.

The Chilling Rock

The Paragon Chilling Rock is the core of the extract chilling system. Designed by Nucleus Coffee Tools in collaboration with industrial designers, every dimension of the rock serves the brew.

–      Material  Food-grade 304 stainless steel with a titanium coating, built for the repeated freeze-and-use cycles of a daily brewing practice.

–      Form  Spherical, by design. The shape maximises surface area contact with the brew stream for even, consistent chilling across the full extraction.

–      Core  A high-density liquid gel fill that reaches colder temperatures, holds them longer, and freezes faster than hollow or water-filled alternatives.

Specifications

–      Weight  1,043g

–      Dimensions  165mm (W) x 120mm (D) x 260mm (H) Base dimension: 6 inches by 4.75 inches

–      Stand Material  Lightweight aluminium alloy

–      Chilling Rock Material  Food-grade 304 stainless steel with titanium coating

–      Compatible Brewers  Origami Dripper, Suprima Instrument SD-1R, Solo Dripper, April Brewer, Hario V60, and most single-server pour over drippers.

–      Compatible Scales  Compatible with most pour over brewing scales.

–      Care  Hand rinse the chilling rocks with water after each use. Wipe dry. No soap required. Do not clean in the dishwasher. Store rocks in the freezer between uses.

–      Origin  China

–      Warranty  One-year parts warranty from Nucleus Coffee Tools.

There is a moment just before the shot pulls when the puck either holds or it doesn't. Distribution is the variable most often overlooked and most quietly consequential. A dose settled unevenly into the basket means water finds the path of least resistance, and the cup that follows tells you exactly where it went.

The NCD Nucleus Coffee Distribution Tool was designed to address that moment. Developed by Sasa Sestic, the 2015 World Barista Champion, and tested at the Switzerland University of Applied Technologies, it brings a patented four-blade distribution system to a format that works consistently across skill levels and service volume.

Designed by a World Barista Champion

Sasa Sestic took the World Barista Championship title in 2015 and has spent the years since working on the tools that make consistently excellent espresso more achievable. The NCD is one of them. Its four-blade geometry came from a practical question: how do you settle coffee grounds evenly into a basket, every time, without introducing new variables?

The patented design has been tested at the Switzerland University of Applied Science, giving the distribution claim a basis beyond feel. The blades disperse grounds laterally and evenly, reducing the channelling that comes from clumping or uneven settling. An anti-static coating on the tool surface prevents grounds from adhering between doses.

Four Blades, One Consistent Puck

The NCD uses four uniquely angled blades to move coffee through the basket rather than pressing it in. The result is a puck with a level, evenly distributed bed that gives water a consistent path from first contact to last. Combined with the adjustable depth collar, the tool adapts to different basket depths and dose sizes without requiring a separate unit for each.

Numbered height markers run down the side of the adjuster, so changes between recipes can be tracked and repeated precisely. The collar locks in place once set.

Built to Use, Not to Handle Carefully

The NCD is an all-metal tool. Its stainless steel centre and anodized aluminium adjuster and locker give it a weighted, settled feel in the hand. Textured sides and finger grooves make it secure to hold during distribution, even in a fast-paced bar environment. At 386 grams, it has the heft of something built to last.

What's in the Box

•       NCD Nucleus Coffee Distribution Tool  x 1

Basket Compatibility

The NCD is sized at 58.5mm, compatible with IMS and VST precision baskets. Confirm basket diameter against your portafilter before ordering.

Product Specifications

Weight  386g

Dimensions  58.5mm diameter  · 

Material  Centre: Stainless steel / Adjuster: Anodized aluminium / Locker: Anodized aluminium

Compatible Baskets  IMS and VST 58.5mm baskets

Patent Number  M550602

Research  Tested at the Switzerland University of Applied Technologies

Designer  Sasa Sestic, 2015 World Barista Champion

Care  Wipe clean with a dry cloth. Do not submerge in water.

Origin  China               

Building on NucleusCoffee Tools’ reputation for precision and innovation, Bloom redefines brew bed preparation with a focus on control, clarity, and adaptability.

At its core, Bloom helps eliminate inconsistencies in the coffee bed, improves saturation, and optimizes extraction — all while empowering you to brew with greater precision, intention, and confidence.

Designed for brewers who value consistency and ease of use, Bloom integrates multiple functions — from deep distribution to surface refinement and bloom shaping — into a single, compact tool that enhances extraction across any brew method.

Whether you're working with a conical pour-over, flat-bed dripper, immersion brewer, or even an espresso basket, Bloom adapts seamlessly to your method — giving you the consistency and clarity you need to brew exceptional coffee, every time.

Dual Needle Distribution: Precision meets control

Bloom features a two-in-one needle system that includes both Straight and Fan Needle configurations, each designed to address specific challenges in filter coffee preparation.

With a simple twist of the end of the Bloom – the FlowTip – users can switch between needle types, or fully retract the needles for safe storage.

Straight Needle Mode

Reaches the bottom of the brew bed, ideal for conical brewers like V60s. It breaks up clumps, redistributes density, and eliminates air pockets that can lead to uneven flow or ‘choking’. The result is a more uniform extraction from the deepest part of your coffee bed.

Fan Needle Mode

Gently combs the surface, lifting chaff, boulders and other non-soluble particles to the top layer. Assists with lateral fines migration (over vertical), improving drainage, preventing blockage during drawdown, and improving surface evenness. This wider agitation also improves flow control and bed structure across larger brew beds.

Key Differences: Purpose made needles

Most WDT tools look similar. The Nucleus Bloom performs differently -- and it starts with what the needles are made of.

Each needle is titanium nitride (TiN) coated, making them 8x harder than standard stainless steel. That means they resist bending and wear through thousands of doses, holding their shape and precision long after cheaper alternatives have dulled.

But hardness alone isn't enough. The TiN coating also creates a low-friction surface that glides through your grounds without disrupting the bed structure -- distributing evenly, not aggressively.

And because static is the silent enemy of clarity, the Nucleus Bloom's needles absorb 20% more static charge than stainless steel, actively lifting fines and chaff so they don't end up in your cup.

Harder. Smoother. Smarter. The needle was engineered to do more, so your espresso can be more.

Spare needles are also available for separate purchase, and the Bloom can also be disassembled to customize the number or configuration of needles — offering true adaptability for different doses, brewers, or grind profiles.

The FlowTip Difference

FlowTip: Better bloom, better cup

On the reverse side of the tool, Bloom features a FlowTip — a shaping device that helps create a consistent divot in the coffee bed before pouring.

Often, brewers unknowingly pour water onto an uneven coffee bed — one where the depth of the centre is deeper than the edges. This irregular depth leads to uneven saturation, trapping gas in pockets that cause bubbling, turbulence, and poor CO₂ release. As water begins to draw down, it follows the path of least resistance, bypassing parts of the coffee and leading to subtle but significant channeling.

The FlowTip addresses this by creating a deliberate, central divot in the

This helps to even out both the horizontal and vertical bed depth, promoting uniform contact between water and coffee from the very start. T The result is smoother blooming, more consistent swelling across the bed, and a stable structure that enhances saturation and minimises channelling.

This intuitive tool plays a crucial role in creating structural consistency during the bloom phase of filter coffee brewing, particularly for conical drippers. By encouraging a more balanced and controlled bloom, the FlowTip makes it easier for brewers to achieve repeatable, high-quality extractions — no matter their pour technique or dripper type.

More than a WDT

More than a simple needle or WDT tool, Bloom is the missing piece in coffee brewing workflow. It’s intuitive, portable, and built for versatility, equally at home in cafés, at competitions, or on your kitchen bench.

The core features of the Bloom include: 

• Titanium nitride (TiN) coated needles 
• Extra and replacement needles 
• Custom needle configuration 
• Straight and Fan needling modes 
• FlowTip attachment for brew bed depth consistency 
• Easy twist for needle retraction

At its core, Bloom helps eliminate inconsistencies in the coffee bed, improves saturation, and optimizes extraction — all while empowering you to brew with greater precision, intention, and confidence.

Aroma volatile compounds play a key role in our perception of flavour. Typically, they evaporate, filling the air with the scent of coffee we know and love.

To keep more flavor in the cup, we’ve partnered with Zurich University to create the Paragon, a tool which dramatically increases retention rates and maximizes the potential of the brewing process.

The Paragon’s patented design utilises innovative extract chilling technology to elevate your brewing experience.

Resulting from years of extensive research, the tool has been scientfically proven to capture and express up to 40% more key aroma volatile molecules than an identical brew without chilling – flavor that would otherwise be lost to the environment.

–      Material  Food-grade 304 stainless steel with a titanium coating, built for the repeated freeze-and-use cycles of a daily brewing practice.

–      Form  Spherical, by design. The shape maximizes surface area contact with the brew stream for even, consistent chilling across the full extraction.

–      Core  A high-density liquid gel fill that reaches colder temperatures, holds them longer, and freezes faster than hollow or water-filled alternatives.

Specifications

Aroma volatile compounds play a key role in our perception of flavour. Typically, they evaporate, filling the air with the scent of coffee we know and love.

To keep more flavor in the cup, we’ve partnered with Zurich University to create the Paragon, a tool which dramatically increases retention rates and maximizes the potential of the brewing process.

The Paragon’s patented design utilises innovative extract chilling technology to elevate your brewing experience.

Resulting from years of extensive research, the tool has been scientfically proven to capture and express up to 40% more key aroma volatile molecules than an identical brew without chilling – flavor that would otherwise be lost to the environment.

–      Material  Food-grade 304 stainless steel with a titanium coating, built for the repeated freeze-and-use cycles of a daily brewing practice.

–      Form  Spherical, by design. The shape maximizes surface area contact with the brew stream for even, consistent chilling across the full extraction.

–      Core  A high-density liquid gel fill that reaches colder temperatures, holds them longer, and freezes faster than hollow or water-filled alternatives.

Specifications

The Paragon Chilling Rock is the core of the extract chilling system. Designed by Nucleus Coffee Tools in collaboration with industrial designers, every dimension of the rock serves the brew.

–      Material  Food-grade 304 stainless steel with a titanium coating, built for the repeated freeze-and-use cycles of a daily brewing practice.

–      Form  Spherical, by design. The shape maximises surface area contact with the brew stream for even, consistent chilling across the full extraction.

–      Core  A high-density liquid gel fill that reaches colder temperatures, holds them longer, and freezes faster than hollow or water-filled alternatives.

Specifications

–      Weight  56 gram each