... . 3.Can match many famous drilling machine, such as Atlas Copco, Sandvik, Ingersoll- Tapered Drill BitType --Chisel Bits / Cross Bits / Button ... ,T45,T51Face Shape---Plate, Concave, Convex.Bit Shank & Coupling sleeve---R22,R25,R28,R32,R38,T38,T45,T51Down-The-Hole Tools1) DTH BIT---65MM ... /H22, Length: 0.5M to 6.0M.Thread Rod---R25,R28,R32,R38,T38,T45,T51. Integral Drill Rod---H19/H22, Diameter ...