Description: 1. High quality and brand new. 2. Suitable for drilling, tapping, cutting soft metals, aluminum plates, iron, etc. 3. Quick-change compound can be used as an electric drill. 4. One-step tapping can greatly reduce processing steps and time costs, and improve work efficiency. 5. Self-centering blade, unassisted centering 6. High hardness, stainless steel, strong and durable. 7. Indicators: M3x0.5, M4x0.7, M5x0.8, M6x1, M8x1.25, M10x1.5 8. Material: HSS Chuck: 6.3mm (1/4 inch) Hex Chuck Size: M3x0.5: Total length: 55mm, Coil length: 24mm, Hole diameter: 2.5mm M4x0.7: Total length: 54mm, Coil length: 24mm, Hole diameter: 3.3mm M5x0.8: Total length: 58mm, Coil length: 28mm, Hole diameter: 4.2mm M6x1: Total length: 58mm, Coil length: 28mm, Hole Diameter: 5.0mm M8x1.25: Total Length: 59mm, Coil Length: 18mm, Hole Diameter: 6.8mm M10x1.5: Total Length: 59mm, Coil Length: 20mm, Hole Diameter: 8.5mm Square Handle: 6.35mm Package Includes: 6 * Hexagons Hexagons "Good Quality Product