1、STRONG AND DURABLE: The woodworking drill set is made of excellent high speed steel material, possess stable performance and long service life. Screw drill for hardwood, cork, plastic, plywood 2、WEAR RESISTANT AND STRONG: End mill bits is made of high speed steel ultrafine particle material with high wear resistance and high strength, providing high speed cutting applications in all aspects 3、APPLICABLE SCENARIO: The end mill set is suitable for wood processing, industrial hinge installation, model making, ball door, drawer installation and other applications. You can use this material to make fine piercing 4、4 SIZES: This woodworking drill has an incisive 2 slot blade to increase your productivity. 4 pieces in different sizes, 6, 8, 10, 15mm to meet your different needs 5、WIDE APPLICATION: Drill sets are suitable for pistol drill, bench drill, vertical drill, handheld electric drill, vertical electric drill and mobile belt magnetic drill