Material: Made of high-quality material for first-class capacity and durability. Tap Drills - M3x0.5 M4x0.7 M5x0.8 M6x1 M8x1.25 M10x1.5. Short size means it won't shake easily and can drill accurately. This tap set includes SAE, so it has high versatility. Each tap drill is engraved with a label, which is convenient for you to choose the size that suits you. The practical 1/4-inch (6.35 mm) quick-change hex shank has a tapered end to prevent excessive tapping. Rear taper exceeds the thread to prevent over-drilling and damage to the thread. Quick-change composite cone uses drill-ground principle. Drilling and tapping in one, one-step processing, greatly saves processing steps and time costs, improves work efficiency. Wide application: Suitable for drilling, tapping, cutting on soft metal, aluminum plate, iron, etc. Note: Low speed and cutting holes in materials (thickness: less than 3 mm) color: Golden Material: High-speed steel + titanium size: 100 x 70 x 7 mm Package contents: 6 x Tap Drill Bit Only the above package content, other products are not included. Note: Light shooting 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 +/- 1-3 cm.