Feature: mushroom nail tyre repair drill bit, can be used with low-speed pneumatic drillHigh-quality raw materials: high hardness, wear resistance, strength and toughness, heat resistance and corrosion resistanceFish scale cutting edge, sharp edge, sturdy and durableTriangular rhombus cutting surface design, anti-skidding and use more firmlyThere are many specifications, choose different sizes for different job situationsSpecification: Diameter: 3mm, 4.5mm, 6mmMaterial: Alloy steelcolour: SilverPackage Contents:3 x Drill BitOnly 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.