TCT jointing kentanium rail cutter, for cutting U75V or U76NbRe(BNbRe) rails. the cutter of coring bits.Carbide annular cuttersis annular cutterin the overall high-speed steel drill bit based on the change in the front part of the change has become cemented carbide cutting edge, so that the hardness increases cutting, cutting depth longer than the overall carbide. Compared to the overall high-speed steelannular cutterlast longer.