Packing: M42 Bimetal Hole Opener. Diameter: 110mm, depth 34mm, shank diameter, 10mm, center drill: 6*68mm. Material structure: high-speed steel; Ultra-high hardness, high-cost performance, high performance and quality assurance, not easy to break, hardened serrations, long wear resistance and long service life. Detailed Features: sharp tooth shape, low vibration, fast balance when opening the holes, making the operation more stable; Tooth shape design inclined forward and backward, fast cutting speed, compared with ordinary hole saws with equal teeth, it is not easy to jam or pull the teeth. Convenient and Practical: It can be adapted to most tools, such as hand drills, bench drills, rechargeable drills, etc. The handle design can effectively play the role of anti-slip and st...