6PCS HSS Circular Saw Blades Mandrel Rotary Tool Set Fits Dremel Drills Rotary Cutting Blade

Features: Process features: After the air hammer repeated forging, so that the organizational structure of the grain (carbide) refinement, so as to achieve its super metal hardness and wear resistance of the effect. In high speed to play high-speed steel super fatigue resistance fracture performance. Thereby extending its life, and ultimately to save customers time and save energy for the purpo...