... ,12 degree taper) taper rods in most lengths.button bits, cross type bits and chisel bits with(6,7,11,12 degree taper).Bit ... , face design: Flat face, drop centre, Normal and retrac body.tungsten carbide(Buttons):Spherical, ballistic and Conical.(Threaded R32, T38, T45,T51 ... and controlled straightness.4. Down the hole hammers and DTH button bits (Down The Hole Drilling)Offer ir hammers,DHD3.5,DHD340a ...