... 19mm, 22mm, 25mm; Shank hex. 19mm, 22mm, 25mm)Integral Drill rods( Chisel Bit integral. Rod 19mm, 22mm; Shank hex. 19mm, 22mm)Thread ... ,89mm,102mm,115mm, 127mm.)Down the hole drilling(drill bits, hammers, spare parts, drill tubes)Buttons type :Spherical, BallisticWe have our own ... quality is good, but the price is low. button rock drill bit