Chef'sChoice Edge Select Pro Electric Sharpener M120 : Patented 3-stage sharpening process delivers a super-sharp, long-lasting edge to both straight-edge and serrated blades. Manufactured with 100% diamond abrasives for superior sharpness, it customizes edges from more "bite" to ultrafine. The ultrafine flexible stropping discs ensure flawless polish. Needs no honing oil or water. 125 watts. Assembled in USA. 3-year limited warranty. 9 3/4"L x 4 1/4" W x 4"H. Product Features Versatile design sharpens straight and serrated edges 3-stage sharpening system provides an edge more sharp than a razor Stages 1 and 2 feature 100% diamond coated conical disks Stage 3 uses flexible stropping/polishing disks Produces a more durable, longer lasting edge in minimal time Uses Trirazor-Plus for optimum edges on gourmet cutlery, butcher type knives, sporting blades and serrated knives 100% diamond abrasive system is guaranteed to never detemper your knives Perfect for economical and high-end, quality knives Patented elastomeric springs hold knives securely against precision guides for accurate control of sharpening angles Uses 100% diamond coated conical disks in stages 1 and 2, stage 3 uses a revolutionary patented flexible stropping/polishing disk for a system that creates edges of hairsplitting sharpness in seconds Requires no water or honing oil Includes detailed photographic instruction booklet