... working efficiency 3.long working life 4.11 years' factory diamond file set1) Standard Shape: 6 shapes (flat, semi-round ... , square, triangle, round), or upon your request 2) Diamond grit: 150# or as your requirement.3) Coating: Nickel, chrome ... working life4.top quality5.eco-friendly package Art.No.Diamond File SetSize3X98X50MMDiamond Grit150#Packingdouble blisterCTN Size/Quantity26×27×30CM/ ...