... the Certificate of ISO9001 in 1999. 1,We supply chisel bits.2,We are outstanding because of being professional. We ... Retrac X-type bits, Cross Bits,high pressure drilling tools, DTH Hammers, DTH Bits, Reaming bits, mineral pick cutter, chisel bits, tapered drill bitsWe ... ,115mm, 127mm.)Down the hole drilling(drill bits, hammers, spare parts, drill tubes)Buttons type :Spherical, Ballistic chisel bits