DMT Diafold Diamond Whetstone DM. This Knife Sharpening System professional product specialists at DMT is a versatile and convenient general-purpose sharpener that delivers two stage sharpening with compact convenience. Two Diamond Whetstone sharpeners are combined to create a lightweight sharpener for all sorts of edges from knives to scissors to axes and more. For an amazing way to make sure your knife is will outperform the rest choose the DMT Diafold Diamond Whetstone. Specifications for DMT Diafold Diamond Whetstone: Manufacturer: DMT Color: Black Closed Length: 4.5 in Package Contents: DMT Diafold Diamond Whetstone DMT DMFWX: Diafold Diamond Whetstone