... SMALL AND EASY TO USE GOOD QUANLITY Clock & watch precision screwdriverManufacture and supply various full series of screwdriver bits, nutsetters, nut drivers ... ,8660,S2Surface treatment:sandblasted, tin-coating, Cu-coating, Ni-coating, Cr-coating, Zn-coatingHead types:PH, PZ, slot, Torx, square, hex ...