Specifications: Name: Hexagon handle compound Tap Drill Bits Metric : M3x0.5， M4x0.7， M5x0.8， M6x1， M8x1.25， M10x1.5Material: High-speed steel(HSS )Color: Silver Or Golden(Random delivery)Suitable for soft metal， aluminum， ironSize:M3x0.5: Total length: 55mm， Spiral length: 24mm， drill diameter: 2.5mmM4x0.7: Total length: 54mm， Spiral length: 24mm， drill diameter: 3.3mmM5x0.8: Total length: 58mm， Spiral length: 28mm， drill diameter: 4.2mmM6x1: Total length: 58mm， Spiral length: 28mm， drill diameter: 5.0mmM8x1.25: Total length: 59mm， Spiral length: 18mm， drill diameter: 6.8mmM10x1.5: Total length: 59mm， Spiral length: 20mm， drill diameter:8.5mmSquare handle: 6.35mm(Notice: Manual measurement may be a little error please understand!)Package include:Set of 6Pcs Hexagon handle compound Tap Drill Bits