3pcs Socket Adapter 1/4 3/8 1/2 inch Nut Driver Sockets Impact Hex Shank Extension Drill Bits Bar with Steel Ball Set Feature:1. It is made of high quality CR-V material, fine workmanship, hard, durable and accurate.2. The spring ball lock ensures a close fit with the driver head to prevent slipping during use. 3. After special processing, it can be firmly installed into the hand-held screwdriver, drill bit screwdriver or impact wrench.4. Lightweight, fast, can be ed to standard hexagon screw driver. The function head has locking and magnetic functions.5. The gear is mounted in a die casting body with 3 sets of ball bearings for long-lasting durability. The 1 / 4 inch hexagonal drive shaft can be quickly replaced and is suitable for most electric drills and screwdriver chucks. Specification:Material: CR-VDrill bit size: 6.35mmQuantity: 3pcsNote: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!2. Please allow 1-2cm measuring deviation due to manual measurement. 3 X Drill Socket Adapters