Since 1976, DMT Diamond Machining Technology has been recognized as the leading innovator in diamond sharpening technology for people and industries dependent upon high performance edges. DMT diamond surface flatness exceeds that of ground steel plates—a precision standard not attained by other manufacturers of sharpeners. Incorporating diamond’s ability to abrade hard metals, DMT’s engineering and product development expertise and patented processes have evolved and expanded to service many markets. DMT pioneered such ground-breaking innovations as the DuoSharp® bench stone, the Diamond Whetstone™, and the Diafold® Magna-Guide Sharpening System. Based out of Marlborough, Massachusetts, USA, DMT continues to develop new and exciting diamond sharpening solutions for both consumer and commercial applications. DMT is committed to developing and producing the world's finest diamond knife and tool sharpeners. DMT takes pride in the fine workmanship of their products, and they only use the highest quality materials in their manufacturing process. All of their products are guaranteed to be free of defects, and any product that doesn't live up to DMT's high standards will be replaced free of charge by the company.