It often happens that an old thread has come off and a new one needs to be cut. To make this process easier and faster, special drills with a tap have been invented. They are clamped in the chuck of a drill or screwdriver like ordinary drills and you can cut the necessary thread effortlessly. For better quality work you should set a low speed on the drill, so that a sharp movement does not damage the thread. The drill bits are made of steel. The diameter of the head is 6.35 mm and the shape of the head is hexagonal. The set contains 6 drills from M3 to M10. Suitable for aluminum, plastic and soft metals.