The Chef'sChoice Commercial Electric Sharpener Model 323 is a cost effective alternative to sharpening services for small commercial kitchens, delicatessens and caterers. This professional two-stage Diamond Hone knife sharpener for 20-degree class knives incorporates the most advanced technology from Chef'sChoice to sharpen both straight edge and serrated knives. It creates a novel long lasting edge of unprecedented sharpness in seconds. The unique 100 percent diamond-plated abrasive disks in Stage 1 remove the old edge and produce the first bevel in seconds. The revolutionary flexible abrasive disks in Stage 2 are made of a proprietary barber-strop-like polymer and sharpen serrated edges and polish straight edges to hair-splitting sharpness. A typical knife can be sharpened in 45 seconds and resharpened in just 15 seconds. This is a user friendly sharpening system with built-in precision angle guides that eliminate guesswork and produce consistently excellent edges every time. It safely sharpens the entire range of kitchen knives without ever detempering the blades.2-stage commercial electric sharpener applies an edge to 20-Degree class knives100 percent diamond abrasives create a sharp knife edge. Creates a longer lasting, double-bevel edgeIn the finishing stage, ultra-fine diamond abrasives create an unparalleled polished edge. Precision angle guides ensure accurate sharpening and eliminate any guess work.