Combination Metric Thread Tapping Diamond Review

【6 Different Sizes】 6 sizes in one drill and tap bit set (M3 x 0.5, M4 x 0.7, M5 x 0.8, M6 x 1, M8 x 1.25, M10 x 1.5) to meet your diversified requirements, can use for tapping various threads. 【Designed with Drilling Function】 They are taps with drilling function, used to drill a hole and cut new threads at the same time, you will have a smooth tapping experience with them. These taps are used on a machine to do the tapping, generally more accurate because human error is eliminated. 【Spiral Flutes Design】 These taps are designed with spiral flutes and the chip clearing process would be better. 【High Hardness & Rust Resistance】 These taps are made by high speed steel and surface finished by nitriding for high hardness and rust resistance. 【Widely Application】 Suitable for drilling and tapping on wood, plank, plastic, soft metal like aluminum, iron, etc. Ideal for hole drilling, tapping and deburring/countersinking applications.