... hardness,high wearability, tartness, fast cutting speed and long tool life Cutting Tool Diamond File a)stainless steel materialb)various size for ... , abrasion hardness,high wearability, tartness, fast cutting speed and long tool lifeCoating:Nickle, Chrome,TitaniumPaking:5PCS set/plastic bag or 10PCS ... to contact with me at any time:) diamond types of hand files