This is a convenient tap drill set that can simultaneously complete hole drilling, tapping, deburring and countersinking. Suitable for drilling and tapping on wood, plank, plastic, metal like aluminum, iron, etc. for hole drilling, tapping and deburring/countersinking applications. Features - Color: Assorted color. - Material: Steel. - Size: 7.00 x 0.60 x 0.50cm/ 2.75 x 0.24 x 0.20 inch. - Back taper exceeds the tap to prevent over-drilling and damage to the thread. - Our 6-piece titanium combination drill taps set is made from high speeds steel. - 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 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 is eliminated. Package list: 6 x drill bits