Features EXCELLENT PERFORMANCE: High hardness, rust-proof, solid and durable. Taps are designed with spiral grooves and the chip removal process would be better. Make your life easier: simultaneous drilling and tapping saves time and effort. Meet your different needs: there are a total of 12 pieces taps in 2 different standards, which you can use for tapping different threads. THOUGHTFUL DESIGN: Their specifications are clearly marked on the surface and can be conveniently selected. EXCELLENT CUSTOMER SERVICE We care about the feelings of every customer. If this product does not meet your expectations, please do not hesitate to contact us. We will do our best to serve you. Taps increase operational efficiency by allowing drilling and tapping in a single pass. These HSS drill bits and taps are great tools for making screw threads, cutting or shaping the female part of the matching pair. They are used on a machine for thread cutting, such as a lathe. Specification: Material: high-speed steel (titanium coated). Standard: metric,inch Color: Metric: Gold, Inches: Silver Hex shank: 6.35 mm (1/4 inch). Metric size: M3 x 0.5 mm, M4 x 0.7 mm, M5 x 0.8 mm, M6 x 1 mm, M8 x 1.25 mm, M10 x 1.5 mm. Inch Size: 1/4-20NC,12-24NC,10-24NC,10-32NC,8-32NC,6-32NC Quantity: 12 pieces. Weight: approx. 192 g. Package list: 12 x taps. 1 x Red Case Package List