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DMT is recognized as the worldwide leader in...


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DMT is recognized as the worldwide leader in diamond knife sharpeners and sharpening products, with a diverse product line and reputation for quality and innovation. DMT’s patented and award-winning products are known for their superior quality and versatility, are easy to use, and allow for sharpening in a fraction of the time required by other methods. DMT manufactures a full line of diamond knife sharpeners and other sharpening tools for use in woodworking, culinary arts, gardening, camping, fishing, hunting, outdoor and winter sports, industrial applications and more.

Diamond abrasives provide the fastest, easiest and most effective way to sharpen an edge. Unrivaled in both performance and durability, DMT brand sharpeners have earned the reputation as the best sharpening products on the planet.
Since 1976, DMT has been in business to do just one thing: make the world’s best diamond sharpeners. Product innovations such as our signature polka-dot interrupted surface, and others with our continuous surface of high-performance diamond, are praised worldwide for their superior quality. From pocket-sized whetstones to heavy-duty bench stones, the difference arrives time and again through our undivided pursuit of sharpening excellence.

Diamond Coverage differs widely from one manufacturer to the next. For long-lasting performance, DMT makes certain that each sharpening surface carries the most diamonds per square inch in the industry.

Diamond Uniformity is also key to sharpener performance. DMT uses a proprietary process that ensures near-perfect consistency in grit size. The result is a micronized monocrystalline diamond that covers evenly across the sharpening surface to prove effective with every use, year after year.

DMT History
By definition, only one company can be the industry leader. Diamond Machining Technology (DMT) is that leader, recognized worldwide for product quality, performance and customer service since 1976. Only the best products will carry the DMT brand.

Founded in 1976, DMT is the leading innovator of manual diamond sharpening technology for people and industries dependent upon high performance edges. Incorporating diamond’s ability to abrade hard metals, DMT's engineering and product development expertise and patented processes have evolved and expanded to service industrial, commercial and consumer markets. The company offers sharpening solutions for virtually every user-from do-it-yourselfers to professionals and large commercial operations. DMT specialized, precision sharpening systems function easily and efficiently to sharpen, hone, lap or deburr in the production, maintenance and repair cycles of a myriad of products.

DMT continues to be an entirely ‘Made in the USA’ company with all products manufactured in the company’s facility in Marlborough, Massachusetts and distributed throughout the world.

How was the DMT sharpener invented? Originally a manufacturer of grinding wheels the company repurposed a center punch-out of a diamond grinding wheel and developed an entire new way of manual sharpening. After testing a sample of a center punch out sent to them, a purchasing agent for L.L. Bean extolled the product’s sharpening performance and worked with the engineers at DMT to refine the resulting product..The result of that cooperation launched DMT on its way to becoming the recognized leader and the industry standard in diamond honing hand tools. L.L. Bean remains a DMT customer to this day.

Suddenly, there was an available alternative to the traditional methods of sharpening that required no messy oil, never grooved or hollowed, and lasted and lasted. It was an unbreakable, clean-cutting, and super-fast sharpener, It was a tool that could sharpen any material, including the toughest composites, ceramics and any metal, including tungsten carbide and even polycrystalline diamond (PCD) inserts.

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