Nuvita Knife Sharpener 3 Stage Knife Sharpening Diamond System Ergonomic Design and Material--ABS+tungsten steel+ceramic rod+electroplating rod.ABS plastic and Non-slip rubber feet designed handle offer you a firm grip, and the ergonomic design suits your palm pretty well.Durable and solid, high quality components guarantee long time usage. Feature of Structure--It is also balanced and weighted so it stands on the counter with out falling over.Underneath it is also constructed with rubber pads so it does not slide as you are sharpening Precise 3 Stage Systems--Knife Sharpener Effective and fast, it sharpens your knife from blunt to razor sharp in 4 strokes or less.It includes the ceramic grinding stone for normal sharpening (can be used weekly), coarse stage - which helps sharpen blunt knives, and the last stage is the fine stage to help remove burrs and helps grind a smoother and sharper edge. Application--For straight and serrated santoku and other double-bevel style knives,ideal for for Kitchen knives, chef knives, fruit knives, bread knives , etc . You can keep it on the counter near your knives as it is very nice looking. It even matches you kitchen of black and chrome. Caution--Do not suit for scissors;Do not overpower and back and forth when grinding;Do not put the sharpener into the water or dishwasher;Clean the knife with the water or wiper and dry it after use.