Does the SteelPro remove metal from my knife-edge?
Yes, any steeling, whether with a conventional manual steel or the SteelPro, removes a microscopic amount of metal from the knife-edge. Much less metal is removed with the SteelPro because of its precision angle guides. After two thousand strokes, less than five (5) milligrams of metal are removed by the SteelPro. That is the approximate weight of only 5 four-inch long hairs!