and noble quality. perfect for auto repair and machinery where metric threads are specified Suitable for drilling, tapping, cutting on soft metal, aluminum plate, iron, etc. Fast replacement composite cone, uses drill edged principle. Drilling and tapping in one, one-step processing, greatly save processing steps and time costs, improve working efficiency. The material is high-speed steel, sharp and durable, the overall drill bit has high concentricity, and the drilling is more accurate. Self-centering point, do not need assistant center drilling or center punching. High hardness, rustproof, solid and durable. Name:12-piece imperial hexagonal three-point drill + hexagonal twist drill set Specifications: One 60mm quick-change adapter -point drill 3/32,1/8,3/16,1/4,5/16,3/8 Hex Twist Drill 3/32,1/8,3/16,1/4,5/16 Note:Due to different production batches, the color of the plastic box is random,'t accept the specified color Colour:As Shown Material:high speed steel Package Contents: 1 * hexagonal twist drill set(12-piece imperial hexagonal three-point drill) 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.