With his three-stage design: coarse fine and extra griding this knife sharpening kit works for both ceramic and steel knives of every size and different level of dullness. It only takes 3 to 4 pulls through the sharpener to restore any knife to a precision edge. ALL knives need to be maintained.Even the BEST HARDEST metals lose their edge with normal use. It's the nature of a knife... the sharper it is the more regular maintenance it'll need.But this is no longer a chore Our 4 in 1 sharpener will make regular maintenance of your fine edges as well as complete resharpening a pleasure and easier than ever With his three-slot design: tungsten sharpener diamond sharpener ceramic sharpener this knife sharpening kit works for both cera knives and kitchen shears of every size and different level of dullness. It only takes 3 to 4 pulls through the sharpener to restore any knife to a precision edge. The solid ABS plastic body and slip-resistant rubber feet means the knifesharpener is easy to handle and stays put during use. Compact easy to use and quiet it can be conveniently stored in a drawer. Caution: Our knife and scissor sharpener is not for use on serrated knives or scissors.Handle with care when trying to sharpen ceramic knives.If misused scratches may appear on ceramic knives edges. Product Dimensions: 3.35 x 2.24 x 9.06 inches Item Weight: 9 ounces