... mining tools, including five series, more than 500 types. They are Tapered Drilling Tools, Threaded Extension Drilling ... 22mm, 25mm; Shank hex. 19mm, 22mm, 25mm)Integral Drill rods( Chisel Bit integral. Rod 19mm, 22mm; Shank hex ... 102mm,115mm, 127mm.)Down the hole drilling(drill bits, hammers, spare parts, drill tubes)Buttons type :Spherical, BallisticWe have ... the price is low. button rock drill bits