Material: Cr-V
Size: 3 ~ 6 mm (1#), 6 ~ 8 mm (2#), 8 ~ 11 mm (3#), 11 ~ 14 mm (4#), 14 ~ 18 mm (5#), 18 ~ 25 mm (6#)
Hardness: 48 ~ 52HRC
Coarse thread
Packed by double blister.
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