1. Material: carbon steel, stainless steel, brass, alum.
2. Diameter: #0~#17 or M2~M6.3.
3. Length: 1/4~8" or 6mm~200mm.
4. Standard: IFI, DIN, JIS, BS.
1. Head type: pan head, round head, oval head, hex washer head, hex head, flat( C.S.K) head, cheez head, truss head, round washer head, etc.
2. Drive type: Phillips, star, pozi, square, slot, phillips/slot, etc.