Q7 Q8 32mm, 34mm, 36mm, 38mm, 40mm, 42mm
Small Hole Rock Drilling
CE, ISO9001: 2000, API
Tungsten Carbide, High Manganese Steel
Coal Mining,Quarry Drilling or Well Drilling
Air/Sea/Express
High Performance
Down The Hole (DTH) Bit
Flat;Convex;Concave
Spherical; Ballistic; Parabolic
Wooden Box or as Customers Inquire
7° , 11° , 12°