Features: Not only is it suitable for use with bamboo, but it can also be used for puncturing holes such as acrylic, PVC, hard rubber, and leather. Since it is a sharp angle, you can drill holes in just the amount you apply force. [Specifications] Blade diameter: 0.4 inches (9 mm); Groove length: 1.6 inches (40 mm); Total length: 3.1 inches (80 mm); Shank diameter: 0.2 inches (6.35 mm); Weight: 1.0 oz (27 g); Compatible models: Impact drivers, electric drills, drilling machine; Material: wood, PVC, acrylic, hard rubber, leather. For penetration and stop holes; Note: Separate freight