Drill taps are made from high speed steel to ensure sharp, fast execution while maintaining strength and efficiency. The surface is treated with titanium alloy, which greatly improves the cutting performance of the drill bit, is more wear-resistant, 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 for you. 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 lightweight and durable 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