Feature: Professional mushroom nail tire repair drill bit, can be used with low-speed pneumatic drill High-quality raw materials: high hardness, wear resistance, strength and toughness, heat resistance and corrosion resistance Fish scale cutting edge, sharp edge, sturdy and Triangular diamond cutting edge, anti-slip and firmer use There are many specifications, choose different sizes for different working situations Specification: Shank diameter: 3mm, 4.5mm, 6mm Material: alloy steel color: silver Package Contents: 6 x Drill Bits Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.