This Mercer Culinary Double Diamond Manual Knife Sharpener is made with 100% diamond abrasives, and can be used on straight or serrated knives, pocket knives, and sporting knives. It uses two stage sharpening and has a comfortable textured handle for a secure grip. Made with 100% diamond abrasives Patented precision guides for accurate control Extremely sharp, burr-free edge Two stage design, sharpening & honing Sharpens straight edge, serrated, pocket, and sporting knives Produces double beveled edge on a straight blade Textured handle for secure hold Model #: M10200