[Prefabricated Precise Positioning]: This high speed steel center drill bits is mainly used for the prefabricated precise positioning of hole machining, guiding twist drills for hole machining, thereby effectively reducing errors [Light Cutting and Good Chip Removal]: It has the advantages of light cutting and good chip removal; When machining a center hole with a diameter of 2-10mm, this center drill is usually used This 60 degree center drill bit has 5 center drill bits, which can be used to drill holes of different sizes [Made of High-speed Steel]: This center drill bit is made of high-speed steel, with high hardness and good wear resistance [Widely Used]: This center countersink drill bit can not only be used on a lathe, but also can be installed at the end of the workpiece in the center of the lathe