Features: There are 3 styles, metric for titanium & SAE diamond/metric & SAE for titanium /metric blue plating & SAE for titanium, pick your own. Made of high speed steel, which can ensure for sharp, fast execution and retain strength and efficiency. The surface is treated with a for titanium alloy, which greatly improves the cutting performance of the drill. Metric：M3X0.5,M4X0.7,M5X0.8,M6X1,M8X1.25,M10X1.5 ,SAE：1/4-20NC,12-24NC,10-24NC,10-32NC,8-32NC,6-32NC. Each tap drill is engraved with a label, which is convenient for you to choose the size that suits you. The convenient hex shank has a tapered end to prevent excessive knocks. Back taper exceeds the tap to prevent over-drilling and damage to the thread. They are taps with drilling function, three-in-one operation, which can drill, tap, deburr and counter holes on copper, brass, aluminum, metal sheet and plastic at the same for time. Specifications: Material: HSS Storage Box Size: 11.7X10.3X3.3cm/4.61x4.06x1.3in Metric：M3X0.5,M4X0.7,M5X0.8,M6X1,M8X1.25,M10X1.5 SAE：1/4-20NC,12-24NC,10-24NC,10-32NC,8-32NC,6-32NC Package Includes: 13X Screw Tapping Bit 1X Storage Box note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.