Our company is a specialist supplier of all kinds of rock drilling tools for mining, quarry, oilfield and construction industries based in China. The products are including: 1) Rock Drilling Tools and Accessories including chisel bits, cross bits, button bits, retrac bits coupling sleeves, tapered drill rods, integral drill rods, shank adaptors etc. 2) Self-drillling rock bolts, R32 & accessories including couplings, button bits, steel cross bits, steel arch bits, and nuts etc.