The R & D Department of our company has successfully developed the chisel for special materials, using TSG46A material, and the service life of the chisel is over 42CrMo 50%. The stability is more than 2 times, and the service life of tsg48a chisel is more than 42CrMo 100%. The stability is more than 4 times. Self developed material, vacuum quenching, super wear resistant, super durable.