Metal Type : Stainless SteelColor : Black, Green, Red, Marble color3 Stage : Diamond Ceramic TungstenBody Material : ABS plasticFunction 2 : non-slip base and an ergonomic handleFunction 1 : Helps Repair, Restore and Polish BladesFit for kinds of size knives : kitchen knives, 8 "chef knife, 5" Utility knife, 3 "fruit knifeDescription : Manual Accessories Whetstone tool