... part and special spring steel as the blade body. They are not combined through high-speed electron beam, but firstly heat treat ... spring steel and M42/M51 high-speed Cobalt steel;2, the two parts of the blade body and the teeths are heat ... , the unfinished teeths are cylinder-shaped, Welded to the blade body through high-energy;4, longer life, lower price.5, Width can ...