EZE-LAP Diamond Products has been the creator and originator of Diamond Sharpeners since the early 1970's and was founded by Jay Fletcher. EZE-LAP’s patented diamond process and modern technology enables them to produce the finest quality diamond products that remain true and flat throughout their life. The patented heat treatment process bonds the highest quality industrial grade diamond particles in a stainless alloy to a precision matched metal substrate. Due to the resulting surface hardness (72 on the Rockwell C hardness scale), EZE-LAP has created a surface that works on carbide, ceramic, tool steel, hardened materials and modern stainless steels. Diamond Stones are perfect for sharpening hunting and fishing knives, woodworking tools, planer blades, axes and gardening tools. Unlike other sharpening stones no oil or water is necessary and the surface is guaranteed to stay true and flat. Stones are available in coarse to super fine grits and come in various shapes and sizes. EZE-LAP offers the flattest, most consistent production diamond tools available on the market today. Even after years of use the quality and consistency of the finishes that are achieved by these sharpening tools is unsurpassable. EZE-LAP Diamond Sharpening Stones are made entirely in the USA.