Manufacture and supply various full series of screwdriver bits, nut setters, nut drivers, sockets, socket adapters, bit holders Screwdriver bitMaterial types: Cr-V 6150 ... , Zn-coatingHead types: PH, PZ, slot, Torx, square, hex, hex-plus, Z-spanner, Torx hollow, Torx plus, tri-wingOverall length: 25mm, 32mm, 50mm ...