From the manufacturer EdgeCraft Corporation was established in 1985 with a very specific mission; to create one of the world’s best knife sharpener. Our sharpener became an immediate success, acclaimed world- wide for performance and quality. we have a full array of sharpeners electrics, manuals, hybrids and specialty. Chef’s Choice Diamond Hone Sharpener for 15° Knives Model 316 Designed to put a factory sharp, 15 degree precision edge on all contemporary Asian style knives, Chinese style cleavers and the thinner, traditional single-bevel Japanese blades as well as contemporary European/American style knives: Factory sharp edge for 15 degree steel knives Thin, razor sharp edges for effortless food preparation 2-Stage diamond sharpening for stronger edges and faster results—honing and polishing Precision guides sharpen at 15 degrees Resharpen with ultra-fine diamonds—knives last longer For single or double-faceted blades Create the 15 degree edge on thin Euro/American style knives Sharpens both straight edge and fine edge knives The Chef’s Choice Model 316 has two sharpening stages that sharpen the edge at 15 degrees. The first stage hones each side of the edge with fine 100% diamond abrasives. The second stage polishes the edge using ultra-fine 100% diamond abrasives. In both Stage one and two, the left side and the right side of the blade are sharpened separately, which allows the user to hone and polish the traditional single-beveled Japanese blades. The contemporary Japanese blade, Chinese cleavers and modern European style knives should be honed and polished on both sides of the blade. The traditional single-bevel Japanese blade must be honed and polished primarily on the front side of the blade, which has the large factory bevel. Using high precision elastomeric angle guides, the Model 316 will eliminate all the guesswork and provide users with a reliable sharpening method that assures a factory quality edge in just minutes.