mcnerd
Head Chef
Mine are coated with something so there does not seem to be a metal on metal contact, but for me it wouldn't make much difference. If it effected my knives I wouldn't be using them.personally, i wouldnt use anything where the knife makes direct contact with metal (especially with a harder steel)...it could scratch the knife at best, and damage the edge at worst....ive heard great things about the mag bloks, and would get one if i had a good place in my kitchen for them (and if my wife didnt think of them as the "death rack")