DescriptionEach screw tapping bit is carefully crafted, with excellent convenience and accuracy, and will be a good replacement for you. With fast cutting speeds, strong force, easy to use, and will provide a more relaxed way of working.Features-Color: As Shown.-Material: High-speed steel. -Size: About 12.00X1.75X1.75cm/ 4.72X0.69X0.69in. - These taps are made by high-speed steel and surface finished by nit riding for high hardness and rust resistance. -Our 9-piece combination drill taps set is made from high speeds steel, durable for long term use. -The drill taps providing sharp, fast execution and retain strength and efficiency. -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.