1,We supply tapered button bits. 2,We are outstanding because of being professional. We got the Certificate of ISO9001 in 1999. Tapered Button bits, Retrac Button Bits, Rock tools, Rock drilling tools, drilling bits, Coupling, Shank Adaptors, Crossover Coupling, drifting rods, Tapered Rod integral drill steel, Retrac X-type bits, Cross Bits,high pressure drilling tools, DTH Hammers, DTH Bits, ...