CHEF"S CHOICE EDGESELECT PROFESSIONAL KNIFE SHARPENER *Sharpens straight and serrated edge blades *3 stage sharpening system: Stage 1 - 100% diamonds; Stage 2- Super hardened steel; Stage 3 - Flexible stropping disks *Precision angle guides for skill free operation *Sharpens all knives from tip to bolster *110 V *On-off switch *White exterior *Three year limited warranty *UL/ETL and Canadian listed