DMT W6EFC Diamond Whetstone Set – Professional 3-piece diamond sharpening set in hardwood box
Imagine this: you're standing in your kitchen, your favorite chef's knife in your hand – but the tomato slips away instead of being cut. Or you're in the workshop, the plane tears instead of planing, the chisel presses instead of cutting. Dull tools are not only frustrating, they are dangerous. With dull blades, you have to use more pressure and more force – and that massively increases the risk of injury.
The solution? The DMT W6EFC Diamond Whetstone Set – three professional diamond sharpening stones in an elegant hardwood box. No complicated system, no expensive special oils, no hours of learning. Just three sharpening stones, three grits, three steps to perfect sharpness.
Coarse (blue) for neglected blades. Fine (red) for razor-sharp edges. Extra fine (green) for the ultimate polish. Three stones that together form a complete sharpening system – from repair to perfection.
And the best part? These stones are coated with diamonds. Not just any abrasive, but the hardest natural material on earth. That means: faster sharpening, longer lasting, no grinding necessary, works dry or with water.
DMT: The global market leader for diamond sharpening tools
When the first DMT Diamond Machining Technology products came onto the market in 1976, it was a minor revolution in the world of sharpening. Until then, natural stones from Arkansas, Japanese water stones, and oil stones dominated the market. DMT had a radical idea: diamonds as abrasives.
What was initially viewed with skepticism quickly caught on. Today, DMT is the global market leader for diamond sharpening tools. Professional chefs, woodworkers, hunters, butchers—they all trust DMT.
Why DMT?
- Made in the USA: Sharpening stones are manufactured in the USA (wooden box from China)
- 50 years of experience: Continuous innovation since 1976
- Patented technologies: The characteristic "polka dot" pattern
- Professional quality: Trusted by chefs, craftsmen, and outdoor professionals
- Durability: Years of reliable service
The polka dot pattern: More than just a visual feature
The characteristic interrupted dot pattern of DMT Diamond Whetstone stones is not a design gimmick—it is functional engineering:
Advantages of the polka dot pattern:
- Metal abrasion absorption: The indentations catch grinding dust
- Continuous contact: The blade always remains in motion
- Prevents clogging: No clogging of the grinding surface
- Cooling effect: Better cooling when used with water
- Longer service life: Diamonds last longer because abrasion does not stick
This pattern is often copied, but the quality remains unmatched. The difference lies in the precision of the manufacturing and the quality of the diamonds.
The three grit sizes: A complete sharpening system
Coarse (blue) – 45 microns / 325 mesh: The repairer
The coarse stone (blue) is your problem solver for neglected tools:
When to use it?
- Heavily damaged blades: chips, nicks, severe damage
- Completely dull knives: When the blade no longer cuts
- Changing the bevel angle: When you want to set a new cutting angle
- Quick material removal: For quick repairs
Technical data:
- Grit: 45 microns / 325 mesh
- Color code: Blue
- Removal rate: Very high
- Application: Repair, rough shaping
45 microns means: Each diamond grain is approximately 0.045 mm in size. That sounds tiny, but for grinding purposes it is relatively coarse – perfect for fast material removal.
Examples of use:
- Kitchen knife that has not been sharpened for years
- Ax with nicks from chopping wood
- Planer blade with broken cutting edge
- Chisel after hard work in hard wood
After using the coarse stone, you will have a functional cutting edge – not razor sharp yet, but it will cut again.
Fine (red) – 25 microns / 600 mesh: The all-rounder
The fine stone (red) is the most commonly used by many users:
When to use it?
- Slightly dull blades: Knives that still cut, but not very well
- Regular re-sharpening: Weekly or monthly maintenance
- After the coarse stone: Second step in the sharpening process
- Standard sharpness: Sufficient for most everyday tasks
Technical data:
- Grit: 25 microns / 600 mesh
- Color code: Red
- Cutting result: Razor sharp
- Use: Regular sharpening, standard sharpness
25 microns means: Finer diamonds than on the coarse stone, but not yet polished. Perfect for a functional, sharp edge.
Who mainly uses fine?
- Professional chefs for daily re-sharpening
- Woodworkers for planes and chisels
- Hunters for hunting knives and boning knives
- Many consider the fine stone to be a "medium/all-purpose" sharpener
After using the fine stone, you will have a razor-sharp edge – more than sufficient for most applications.
Extra fine (green) – 9 microns / 1200 mesh: The perfectionist
The extra-fine stone (green) is for those who are not satisfied until it is truly perfect:
When to use?
- Polishing & refinement: Final touch after fine
- Maximum sharpness: When good isn't good enough
- Mirror finish: For polished bevels
- Finest tools: Carving knives, scalpels, razors
Technical data:
- Grit: 9 microns / 1200 mesh
- Color code: Green
- Cutting result: Polished, razor sharp++
- Application: Finishing work, polishing
9 microns means: Extremely fine diamonds – almost at the limit of polishing. The result is a highly polished, extremely sharp edge.
Important to know: The extra-fine stone is not for beginners using it for the first time. If you are just starting to sharpen or simply want a functional knife, the fine stone is perfectly adequate. The extra-fine stone is for perfectionists, professionals, and special applications.
After using the extra-fine stone, your blade will not only be sharp—it will be polished. The cutting edge will shine, it will cut through everything effortlessly, and you could (theoretically) shave with it.
Diamonds vs. traditional whetstones: the big comparison
Why diamonds at all?
You may be wondering: why diamonds? Traditional water stones work just as well, don't they? The answer lies in the unique properties of diamonds:
Diamond is:
- The hardest natural material (10 on the Mohs scale)
- Extremely abrasive: sharpens 5x faster than oil or water stones
- Dimensionally stable: hardly wears down, stays flat
- Universal: sharpens all types of steel, even ceramics (with HardCoat version)
The hardwood box: More than just packaging
Elegant storage & practical work surface
The hardwood box of the W6EFC set is cleverly designed:
Functions of the box:
- Safe storage: Protects stones from damage
- Ready to hand: All three stones in one place
- Rubber feet: Non-slip on work surfaces
- Suitable as a gift: Elegant appearance, perfect as a gift
- Compact: Fits in a workshop drawer or kitchen cabinet
Dimensions:
- Box: 19.7 cm x 18.4 cm x 3.2 cm
- Stones (each): 15.2 cm x 5.1 cm x 1.9 cm
Rubber feet: The box has integrated rubber feet on the underside. This means: stable work surface, no slipping during sharpening, no scratching of the worktop.
Application: How to sharpen correctly with the W6EFC set
Basic principle: From coarse to fine
The basic principle of sharpening with the DMT set is simple: work your way from coarse to fine.
Step-by-step instructions:
1. Assess the condition:
- Very dull/damaged? → Start with coarse (blue)
- Slightly dull? → Start with fine (red)
- Just refreshing? → Fine (red) or extra fine (green)
2. Sharpen with coarse (if necessary):
- Stone dry or slightly moisten
- Hold the knife at the selected angle (15-20° for kitchen knives, 20-25° for outdoor knives)
- 10-20 strokes per side with even pressure
- Feel for burrs: If you feel a fine metal burr on the cutting edge → continue to Fine
3. Sharpening on fine:
- Wipe metal abrasion from the coarse stone
- Same technique as for coarse, but 15-30 strokes per side
- Lighter pressure than for coarse
- Burr should be reduced
4. Polishing on extra-fine:
- Wipe off again
- 20-40 light strokes per side
- Minimal pressure – almost only the weight of the knife
- Remove burr completely by alternating strokes
5. Test:
- Paper test: A sharp knife cuts paper effortlessly
- Tomato test: Blade glides through skin without pressure
- Thumb test (be careful!): Run your thumb over the cutting edge – a sharp blade will "grab"
Dry or with water?
One of the big advantages of DMT diamond stones: No oil needed!
Options:
- Dry: Quick, easy, no preparation
- With water: cooling, lubrication, easier cleaning
Recommendation:
- For quick re-sharpening: Dry
- For longer sharpening sessions: With water
- For hard steels: With water (cooling)
Never use:
- ❌ Oil (clogs the diamond surface)
- ❌ Soap/cleaning agents (when sharpening)
- ❌ Abrasive paste (unnecessary, counterproductive)
Who is the DMT W6EFC set perfect for?
The chef/hobby cook
Your knives are your tools – blunt knives are not an option. The W6EFC set gives you everything you need: quick resharpening with fine, repairs with coarse, perfect polishing with extra fine.
The woodworker
Planes, chisels, carving knives – they all need to be sharpened regularly. The large 15 cm surface is perfect for wide plane irons, and the diamonds sharpen even hardened tool steels with ease.
The hunter & outdoor enthusiast
Hunting knives, boning knives, outdoor knives – they have to work in the field. The W6EFC set is compact enough for the hunting lodge and robust enough for years of use.
The butcher/food professional
Dozens of cuts every day – dull knives cost time and quality. The W6EFC set keeps your tools in top shape. Made in the USA, professionally tested.
The beginner
Want to start sharpening? The W6EFC set is perfect: three grits for complete learning, clear color system, easy handling, long service life for many years of practice.
The collector & quality-conscious
You appreciate quality tools and want the best. Made in the USA, world market leader, elegant hardwood box – the W6EFC set makes a statement.
Care & maintenance: How to make your DMT stones last forever
After each use:
- Remove metal abrasion: Rinse with water
- Dry: Wipe with a cloth
- Cleaning: Use mild soap and a brush if necessary
Deep cleaning (every few months):
- Soak: 10 minutes in warm water with dishwashing detergent
- Brush: Scrub with a plastic brush
- Rinse: Thoroughly with clean water
- Drying: Allow to dry completely
Special tip for stubborn stains:
Polymer eraser: A high-quality eraser effectively removes metallic residues. Simply rub it over the surface.
Why buy from Swiss-Sale.ch?
Swiss service quality: Personal advice on grinding techniques, fast response times, expertise in tools and outdoor equipment.
Fast shipping: Shipping from Switzerland – no customs issues, neutral packaging, tracking included, insured.
Fair prices: No hidden costs, competitive prices, VAT included.
Genuine products: Authorized DMT dealer. Original packaging, authentic, Made in the USA quality guaranteed.
Expertise & passion: Run by people who sharpen themselves – we know our products from practical experience.
DMT W6EFC – an investment in sharpness that will last for decades
The DMT W6EFC Diamond Whetstone Set is more than just a sharpening stone set – it's an investment in quality, durability, and professional results.
Three stones, carefully matched. Coarse for repairs, fine for standard sharpness, extra fine for perfection. Diamonds that sharpen 5x faster than traditional stones. Made in the USA since 1976 – trusted by millions of professionals worldwide.
No oils, no grinding, no dressing. Just unpack, moisten (or use dry) and sharpen. Decades of reliable service – that's the DMT guarantee.
The elegant hardwood box makes the set the perfect gift for anyone who values sharp tools. Whether you're a chef, woodworker, hunter, butcher, or quality enthusiast, the W6EFC set delivers.
At Swiss-Sale.ch, you not only get this outstanding sharpening set, but also Swiss service quality: fast shipping, fair prices, genuine expertise.
Three stones. Three grits. One solution for a lifetime of sharp tools.
➔ Order now and never work with dull tools again!
Technical specifications
| Specification | Details |
|---|---|
| Model | W6EFC |
| Manufacturer | DMT (Diamond Machining Technology), USA |
| Set contents | 3 whetstones + hardwood box |
| Stone 1 (Coarse/Blue) | 45 microns / 325 mesh |
| Stone 2 (Fine/Red) | 25 microns / 600 mesh |
| Stone 3 (Extra Fine/Green) | 9 microns / 1200 mesh |
| Stone size (each) | 15.2 cm x 5.1 cm x 1.9 cm (6" x 2" x 3/4") |
| Box size | 19.7 cm x 18.4 cm x 3.2 cm (7.75" x 7.25" x 1.25") |
| Weight (set) | approx. 816 g (1.8 lbs) |
| Surface | Polka dot (broken pattern) |
| Diamonds | Monocrystalline (set single crystals) |
| Base | Steel plate, 8.4 mm thick (0.33") |
| Body | Hard plastic |
| Box material | Hardwood |
| Box features | Rubber feet, non-slip |
| Usage | Dry or with water |
| Oil required? | No |
| Manufacture Stones | Made in the USA |
Scope of delivery
- 1x DMT diamond sharpening stone, coarse (blue, 45 microns / 325 mesh)
- 1x DMT Diamond Sharpening Stone Fine (Red, 25 microns / 600 mesh)
- 1x DMT diamond sharpening stone extra fine (green, 9 microns / 1200 mesh)
- 1x Hardwood storage box with rubber feet
Frequently Asked Questions
1. Do I really need all three grits?
For most users, Fine and Extra-Fine are sufficient. Coarse is only needed if you regularly repair heavily damaged or neglected blades. But together they form a complete sharpening system – from repair to perfection.
2. How long do DMT diamond stones last?
With proper care: decades. The diamonds wear minimally. Professionals report 10-20 years of intensive use without noticeable quality loss.
3. Can I sharpen ceramic knives with this set?
The standard W6EFC set is not suitable for ceramic. For ceramic, you need the DMT HardCoat version, specifically developed for extra-hard materials.
4. Do I need to break in the stones before use?
No! Unlike some waterstones, DMT stones don't require break-in. They're ready to use immediately.
5. Do the stones become hollow over time?
No. The steel base with diamond coating stays flat. No flattening needed like with Japanese waterstones.
6. Dry or with water – which is better?
Both work. For quick touch-ups: dry. For longer sessions: with water (cools and lubricates). Never use oil – it clogs the diamond surface.
7. Why is the box made in China but "Made in USA"?
The sharpening stones themselves are manufactured in the USA – that's the core product. The hardwood box is produced in China. DMT is transparent about this: "Sharpeners made in the USA, other components made in China."
8. How do I find the right sharpening angle?
Kitchen knives: 15-20°, Outdoor/hunting knives: 20-25°, Axes/hatchets: 25-30°, Chisels/planes: 25-30°. DMT also offers a magnetic angle guide separately.
9. Can I sharpen scissors, axes and lawnmower blades too?
Yes! The W6EFC set is versatile: knives, scissors, axes, chisels, planes, lawnmower blades, hedge trimmers – anything with an edge.
10. Is this set a good gift?
Absolutely! The elegant hardwood box, professional quality, long lifespan – perfect for chefs, craftsmen, outdoor enthusiasts, fathers, grandfathers, anyone who values sharp tools.
