6Pcs HSS Center Drill Bits Set,1/1.5/2/2.5/3/5mm 60 Degree Lathe Mill Combined Centre Countersink Bit kit for Metal Positioning and Chamfering Processing

【Function】: Center Drill Bits Set is used for prefabricated precise positioning in hole processing, guiding twist drills for hole processing and reducing errors. 【High Quality】: Center Drill Bits Set is made of high-speed steel, which is sharp and durable, with accurate positioning and clear cutting edge. Fast cutting speed and good chip evacuation. 【Standard 60 Degree Angle】: Each drill has a double head, which can be ground using a standard 60 degree angle. As the center drill rotates between the tool tips, the two end faces of the workpiece receive corresponding centering holes. 【Widely Applicable】: Center Drill Bits Set is suitable for precision center drilling of metals. Suitable for drilling iron, steel, Wood, Plastic, copper, aluminum and other tough materials. 【Different Sizes】: The center drill set includes 7 center drill bits for your choice, with diameters of 1.0mm, 1.5mm, 2mm, 2.5mm, 3mm, 5mm, easy to install and quick-change drill bits to meet your different needs.