8Pcs drilling tool kit: This drilling tool adapter kit includes 8 pieces of drilling tools, which are packed in a plastic box and easy to store. When you open it, it is normal that there will be a smell of gasoline and will not affect the use High quality material: All socket drill adapter is made of heat-treated chromium-vanadium steel, high hardness steel with excellent strength and durability. The heavy duty structure is not easy to break, and has a long service life 3 specifications: 4pcs x 1/4 "drives, 2pcs x 3/8" drives and 2pcs x 1/2 "drives. The perfect size makes it compatible with all brands of electric drills and screwdriver handle tools. So you can easily twist screws, nuts and more. Suitable for automotive machinery and vehicle maintenance, technicians, household maintenance and most general repairs Special design: The surface of each socket adapter is coated to prevent ; There is a small ball bearing above each socket adapter to effectively fix the socket and avoid sliding, so that making your work fast and secure Wide application: Socket adapter for drill are used in the installation of pneumatic screwdriver, electric screwdriver, pneumatic drill, manual screwdriver and other installations for the hexagonal tool. A good accessory for universal socket, reducer set, universal joint set...Is an indispensable tool in the toolbox