A: 1 / 8-1 / 4
II: 1 / 4-5 / 16
III: 5 / 16-7 / 16
Four: 7 / 16-9 / 16
Five: 9 / 16-3 / 4
Six: 3 / 4-1
◆ using CR-V chrome vanadium steel formed by heat treatment.
◆ Fast， easy disassembly is damaged screws. ， Pipes， bolts and tack like.