Duomo The Eight - WDT distribution tool

DUOMO The Eight – The Original WDT Tool from Korea 🇰🇷

Often copied. Never matched.

Discover the ultimate espresso puck preparation with DUOMO The Eight — the original WDT (Weiss Distribution Technique) tool that changed the espresso game. Designed and manufactured in Korea, this competition-grade tool guarantees superior extraction consistency and a ritual you’ll genuinely enjoy.

Sleek, solid, and satisfying — DUOMO combines engineering precision with aesthetic perfection. Its anodized aluminum body feels luxurious in hand, and the silky-smooth spin delivers professional-level distribution with zero clumping. Whether you’re crafting espresso behind a café bar or fine-tuning your home setup, The Eight makes every shot a masterpiece.

☕ The CoffeeNose 👃 says:

“A true espresso artist’s companion — smooth action, elegant build, and  consistent results. Tested & approved at Amsterdam Coffee Lab.”

Why We Love It

✅ Eight precision 0.7 mm needles – for ultra-uniform coffee distribution

✅ Adjustable needle depth (17 – 23 mm) – fits any 58 mm portafilter

✅ Premium aluminum body – sturdy, ergonomic & beautifully finished

✅ Integrated cleaning brush – keeps your needles clean between shots

✅ Consistent, even extractions – more clarity, sweetness, and balance in the cup

✅ Designed & made in Korea – the original, authentic DUOMO

Say Goodbye to Clumps & Uneven Pucks

DUOMO’s patented design refines the Weiss Distribution Technique, eliminating the messy funnels and paperclips of DIY WDT. The eight perfectly spaced needles break up clumps and redistribute grounds evenly, producing a fluffy, uniform coffee bed.

Result? Sweet, balanced espresso with maximized extraction yield — every time.

How to Use DUOMO The Eight

1️⃣ Grind your favorite espresso (freshly roasted, of course ☕)

2️⃣ Distribute grounds evenly in your basket

3️⃣ Place DUOMO on your portafilter

4️⃣ Gently press needles into the coffee bed

5️⃣ Spin 3–5 times for even distribution

6️⃣ Remove DUOMO, tamp evenly, and pull your shot

7️⃣ Taste espresso perfection 😋

Technical Details

• Fits 58mm portafilters
• Needle diameter: 0.7 mm (8x)
• Adjustable needle depth: 17–23 mm
• Material: High-grade aluminum body
• Made in Korea
• Replaceable needles
• Fits 18 gr+ baskets

Expert Insight

While the DUOMO ensures unmatched consistency, baristas should balance its precision with workflow efficiency — especially in busy café environments.

👉 Need help optimizing your café’s espresso workflow?

Amsterdam Coffee Lab offers professional barista training and workflow consulting — from puck prep to sensory evaluation.

Extract more with the CoffeeNose👃

The Duomo stands as the original WDT tool, with a variety of imitations flooding the market, from low-cost replicas to high-end vibrating devices. Our comprehensive testing of the Duomo reveals its exceptional performance, achieving higher extraction rates and producing sweeter shots with remarkable consistency. It effectively reduces static and enhances your brewing quality. 

I begin with the Duomo and then use a leveling tool (such as the Motta competition or OCD). In most cases, a tamper is not required and can sometimes lead to uneven tamping, as the distributor already compresses the puck sufficiently to maintain its integrity when placed in the group head. 

This workflow helps to #extractmore sweetness.

more tips from the CoffeeNose👃

The Weiss Distribution Technique (WDT) is an espresso puck preparation method aimed at improving extraction consistency. Here's a breakdown:

What it is:

• WDT involves using a thin tool to stir and distribute ground coffee within the portafilter basket.
• This breaks up clumps and ensures an even density of coffee grounds.
• The goal is to prevent "channeling," where water finds easy paths through the coffee, leading to uneven extraction and poor flavor.

Why it's important:

• Improved Extraction: Even distribution allows water to flow uniformly, extracting flavors more consistently.
• Reduced Channeling: Prevents water from rushing through weak spots in the coffee bed.
• Enhanced Flavor: Results in a more balanced and nuanced espresso shot.

The tool:

• A WDT tool typically consists of thin needles or pins. 
  
• The tool's purpose is to gently stir and redistribute the coffee without overly compressing it.

Key considerations:

• Proper Technique: Gentle and thorough stirring is crucial.
• Appropriate Tool: Thin needles are essential for effective distribution.
• Dosing Funnel: A dosing funnel helps contain the grounds and prevents spills.

Essentially, the WDT tool is a simple but effective device that can significantly improve the quality of your espresso by promoting even extraction.

more tips from the CoffeeNose👃

Tip: add filters, coffee machine cleaner, descaler, tea, chocolate and coffee to your order. This way the shipping becomes more economical 🫰and sustainable 🌍, especially when shipping internationally.

Don't miss our bulk prices (staffelkorting) with the best price at 6 boxes!

Why not team up with family, colleagues, or coffee buddies for a group order? This way, you can save on shipping costs while promoting sustainability. Enjoy the advantages of our one-stop shopping experience with a best price guarantee.

Sending your package to a (Mondial Relay) parcel point might be a beneficial option for you.

Learn more

Our Best Price Guarantee will match that price and add some free goodies on top! 

Also for spare parts that are not in stock. We can probably order them for you. Just reach out and you can benefit from our one-stop shop for coffee lovers. ​

Request a price match

Unlock the secrets of perfect espresso in our dynamic workshop! Treat yourself or surprise a coffee lover with an unforgettable experience that will elevate their brewing skills.

Are you as passionate about coffee as we are? Join our Barista course in Weesp at Amsterdam Coffee Lab! Immerse yourself in the incredible universe of coffee and learn from Wouter, our expert trainer, who is not only a skilled barista trainer but also a sensory specialist known as the CoffeeNose 👃

Join our Barista workshop to explore the fascinating world of coffee, where science meets artistry. With Wouter's in-depth expertise in flavor profiles and brewing techniques, you'll gain a fresh outlook on coffee. This course is designed for everyone, from novices to home baristas with experience, and will help you refine your skills and take them to the next level.

At Amsterdam Coffee Lab, we believe in the power of practical learning. In our hands-on workshops, you'll explore everything from creating the perfect milk foam to mastering espresso techniques. Each session is designed to meet your individual needs, giving you the confidence to brew coffee like a professional.

Seize the chance to tap into Wouter's knowledge and immerse yourself in our exceptional offerings!

Register today for the barista course in Weesp and unlock the secrets of exceptional coffee. Your journey to coffee perfection starts here at Amsterdam Coffee Lab.

If you can, bring your own machine and grinder so we can train you on the equipment you use every day. When you can not bring your own tools, make pictures of your equiment. 

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Espresso is a delightful journey of flavors, ranging from rich nutty and chocolate undertones to vibrant floral and fruity notes. We will embark on an exciting tasting adventure, and remember, just like with fine wine, you have the option to spit it out if caffeine is a concern for you. Don't miss out on this experience!

Join us on this exciting journey where you will uncover:

• the secrets to selecting the finest coffee beans for espresso

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• the art of grinding those beans to perfection for maximum flavor - dialing in your grinder.

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• how to craft a personalized recipe and technique that elevates your brewing game

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• the importance of choosing the right water for an exceptional cup

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• how to fine-tune your recipe to match your unique taste preferences

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• the ideal coffee-to-water ratio that will transform your brew

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• how to make espresso based beverages. From americano and lungo to cortado and latte.
  

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• how to keep your espresso machine and grinder pristine and free from any bacteria that could compromise your coffee's taste

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• the best practices for storing your coffee to ensure it stays fresh and flavorful

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• and a treasure trove of additional tips and tricks that will make you a coffee connoisseur

Learn more

Do you crave the excitement of discovering exquisite coffee flavors and captivating aromas? Don’t miss out on our exclusive Coffee Tasting Experience @ Amsterdam Coffee Lab, where you’ll not only indulge your senses but also gain valuable insights into the world of coffee. Join us for an unforgettable journey!

Join us for a fun and informative sensory experience revolving around coffee. Fun for your brain, taste buds and nose!

More info & booking ⬇

Choose your tasting experience

Unlock the secrets of perfect espresso in our dynamic workshop! Treat yourself or surprise a coffee lover with an unforgettable experience that will elevate their brewing skills.

Are you as passionate about coffee as we are? Join our advanced home barista course in Weesp at Amsterdam Coffee Lab! Immerse yourself in the incredible universe of coffee and learn from Wouter, our expert trainer, who is not only a skilled barista trainer but also a sensory specialist known as the CoffeeNose 👃

This course is designed for home baristas with experience. You know how to dial in an espresso and are even doing latte art, but good is not good enough for you. You want to refine your skills and take them to the next level.

At Amsterdam Coffee Lab, we believe in the power of practical learning. We will meet your individual needs, so you can learn to brew espresso like a professional. 

Seize the chance to tap into Wouter's knowledge and immerse yourself in our exceptional offerings! Being a proficient barista requires not only technical skills but also a keen sense of taste to evaluate the espresso and suggest necessary modifications. You will shift your focus from the usual metrics (extraction time, dose, yield, etc.) and reconnect with the core principles of tasting, assessing, and leveraging your expertise to improve the next shot!

If you have the opportunity, please bring your own machine and grinder so we can train you on the tools you work with every day. If you can't bring your equipment, please take some pictures of it.

​

Espresso is a delightful journey of flavors, ranging from rich nutty and chocolate undertones to vibrant floral and fruity notes. We will embark on an exciting tasting adventure, and remember, just like with fine wine, you have the option to spit it out if caffeine is a concern for you. Don't miss out on this experience!

In the masterclass you will learn:

• dialing in the next level 
  

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• adaptive dosing
  

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• advanced puck preparation
  

• how to fine-tune your recipe to match your unique taste preferences

• how to make espresso based beverages based on the blend/beans
  

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• basics of temperature and pressure profiling 
  

• and a treasure trove of additional tips and tricks that will make you a coffee connoisseur

What we concentrate on is entirely up to you. Would you like to delve into a particular topic or cover your entire routine?​

Learn more