Made of Chrome Vanadium steel
Heat treated, hardness about HRC52-58
Size: 6x10x100mm 8x12x115mm
Packed by hung card
Positioning first, then drilling to prevent drilling deviation
Made of Chrome Vanadium steel
Hardened punch
Two types of punches to meet the requirements of various hole diameters
Tail tempering treatment
The hardness of the tail after tempering is about HRC52-58