Brand new and high quality. Name: Hex handle compound Tap Drill Bits. Metric: M3x0.5, M4x0.7, M5x0.8, M6x1, M8x1.25, M10x1.5. Material: High-speed steel(HSS), Titanium Plated. Suitable for soft metal, aluminum, iron. Size: M3x0.5: Total length: 54mm, Spiral length: 24mm, drill diameter: 2.5mm. M4x0.7: Total length: 54mm, Spiral length: 24mm, drill diameter: 3.3mm. M5x0.8: Total length: 56mm, Spiral length: 28mm, drill diameter: 4.2mm. M6x1: Total length: 57mm, Spiral length: 28mm, drill diameter: 5.0mm. M8x1.25: Total length: 58mm, Spiral length: 18mm, drill diameter: 6.8mm. M10x1.5: Total length: 58mm, Spiral length: 20mm, drill diameter: 8.5mm. Square handle: 6.35mm. Package include: 1 x Hexagon handle compound Tap Drill Bits