Drill taps are made from high speed steel to 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 . The convenient 6.35mm quick-change hex 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 durable for easy storage and is suitable for all work environments Colour: 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.