Feature: Professional mushroom nail tyre 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 resistance Fish scale , edge, sturdy and Triangular rhombus cutting design, anti-skidding and use more firmly There are many specifications, choose different sizes for different job situations Specification: Shank Diameter: 3mm, 4.5mm, 6mm Material: Alloy steel colour: Silver Package Contents: 3 x Drill Bit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.