... ,12 degree taper) taper rods in most lengths.button bits, cross type bits and chisel bits with( ... face, drop centre, Normal and retrac body.tungsten carbide(Buttons):Spherical, ballistic and Conical.(Threaded R32, T38, T45,T51 ... straightness.4. Down the hole hammers and DTH button bits (Down The Hole Drilling)Offer ir hammers, ... hole drill tools.(Rod, Cross type bits, button bits and X type bits etc)