Drill taps are made from high speed steel to , fast execution while maintaining strength and efficiency. The is treated with titanium alloy, which greatly improves the cutting performance of the drill bit, is more wear-, and prolongs the service life. 3-in-1 operation provides drilling, tapping, deburring for quick job completion on copper, brass, aluminum, sheet metal and plastic Each tap is engraved with a label so you can choose the right size . The convenient 6.35mm quick-change hex shank has a tapered end to prevent over-tapping. The back tap exceeds the tap to prevent over drilling and damaging the threads. 6pcs drill tap set, including: 0.5MM 0.7MM 0.8MM 1.0MM 1.25MM 1.5MM Storage case is and for easy storage and is suitable for all work environments Colour:As Shown Material:high speed steel Size: 6 x 10 x 1.2cm Package Contents: 6 x Drilling and tapping integrated drill Only the above package content, other products are not included. Note: Light reflection 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 +/- 1-3cm.