1/4 inch HSS Spiral Hex Combination Drill Screw Tap Bit Set (-M10) With Automatic Spring Loaded Center Punch Tool

Material:High hardness rustproof solid and durable; Self-centering design:do not need additional center drilling or center punching Fast replacement composite cone uses drill edged principle. Drilling and tapping in one one-step processing greatly save processing steps and time costs working efficiency. Metric:M3x0.5 M4x0.7 M5x0.8 M6x1 M8x1.25 M10x1.5.:1/4 inch (6.35mm) hex The Automatic Center Punch delivering an automatic spring- when pressed against surface it can be adjusted cap regulates striking force Widely Use:Suitable for drilling tapping cutting on soft metal aluminum plate iron etc. Note:Low Speed and Cutting holes in materials (Thickness:Less than3mm) Size: M6 M8 M10 Center punch material:iron high-speed steel punch head brass Center punch size:13 cm/ 5 inch in length 1.27 cm/ 0.5 inch in diameter Usage:Suitable for drilling tapping cutting on soft metal aluminum plate iron etc. colour:Golden Material:High speed steel Package Contents: 6*Screw Tap Bit 1*Center Punch Tool Caution:When you use this drill bits the material temperature will high add some water or coolant to avoid the material smoke when using it. Only the above package content other products are not included. Note: Light 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.