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💎 Sharpen smarter, not harder — edge perfection anywhere, anytime!
The DMT 4-in. Extra-Coarse Diamond Whetstone is a portable, high-performance sharpening tool featuring a 60 micron monocrystalline diamond surface that quickly restores damaged edges without oil. Designed for professionals and enthusiasts alike, its durable synthetic build and compact size make it ideal for precise, mess-free sharpening with water or dry. Made in the USA, this whetstone delivers reliable, long-lasting results for knives, chisels, and router bits.
















| Asin | B00004WFV0 |
| Best Sellers Rank | 177,694 in DIY & Tools (See Top 100 in DIY & Tools) 175 in Sharpening Stones |
| Brand Name | DMT |
| Colour | Black |
| Country Of Origin | USA |
| Customer Reviews | 4.8 4.8 out of 5 stars (117) 4.8 out of 5 stars |
| Global Trade Identification Number | 00017042004439 |
| Grit Type | Extra Coarse |
| Included Components | Diamond Whetstone |
| Item Dimensions L X W X H | 22.2L x 8.3W x 5.7H centimetres |
| Item Type Name | Knife Sharpener |
| Item Weight | 0.06 Pounds |
| Manufacturer | DMT |
| Manufacturer Part Number | A4X |
| Material Type | Synthetic |
| Model Number | A4X |
| Number Of Items | 1 |
| Number Of Packs | 1 |
| Unit Count | 1.0 count |
| Upc | 017042004439 |
User
Small it so useful
I use it as an essential part of my sharpening equipment for my woodturning chisels.
User
Not the advertised/named length
This is sold as a 4 inch whetstone. It's actual length is 4.4", worth noting if you need to mount this in anything that requires a specific length. Otherwise this is very good.
User
Excellent quality sharpener
I bought this coarse stone along with some of the other DMT stones awhile ago and have become a huge fan. This particular stone is very effective at repairing an edge, but what I'm most impressed with is the quality. The construction of the stone is solid and tolerances are excellent. This truly will be a lifetime tool for me - which is an important consideration when I buy tools. It's a great example of a quality product made in the USA.
User
Grob genug
ich habe als Vorarbeit den silbernen Schleifstein um arge Scharten im Messer auszuwetzen.danach den hier um die Furchen zu bereinigenOHNE Druck arbeiten, das Teil nimmt es einem sonst übelDie Groben Teile nehmen auch so viel Material abdanach mit welchen auch immer fertig machen (ich hab die weiteren DMT Diamanten rot,grün, blau und fleischfarben)
User
Good
Works well and fits, only use this grit to repair knife edge from heavy damage tho
User
otimo
perfeito!, ja uso a mais de dez anos as pedras da DMT vale o investimento
User
Steel-eating monster.
I bought this to re-bevel blades with my DMT Aligner. I was worried that I should have ordered the XX coarse instead, but I now know that it isn't needed. Maybe if you're trying to grind away something really hard like D2 or ZDP-189 you'll need it, but I don't have anything above 58 or 60 HRC.This things chews through 1095 carbon, 12C27 Sandvik and 8CR13MoV like butter, and has no trouble at all with S30V and VG10. I can put a new bevel on any of my knives in a few minutes with minimal effort.
Trustpilot
2 weeks ago
2 days ago