Product name
High Quality drill bit 32mm-42mm taper 7 1112 degree button drill bit
Advantage
Lower unit drilling cost
Usage
Gold mining , Coal mining , Blasting
Color
Black, red, yellow, golden, as request
Formation
Soft , Medium , Hard , Very hard
Taper degree
taper 7 11 12
Packing
wooden/plastic box
Carbide button shape
Carbide button shape