1、This socket adapter set has 1/2in, 1/4in and 3/8in 3 sizes, which will meet the needs of various working scenarios. 2、Hex shank ensures a stable connection, and the 150‑degree drill bit adapter makes the operation more convenient. 3、Can be used to install pneumatic screwdrivers, electric screwdrivers, pneumatic drills, manual screwdrivers and so on. 4、Also suits perfectly for most electric drills, rechargeable drills, manual wrenches and drive chucks, very practical. 5、The die‑cast body is made of rustproof chrome vanadium steel, has high hardness, and very durable for long use. 1 x 105 Degree Drill Bit Bracket3 x Screwdriver Bit Extension Bar3 x Socket Item Type: Socket AdapterMaterial: Chrome Vanadium SteelSpecifications: 1/2in, 1/4in, 3/8inFunction: Used to install pneumatic screwdriver, electric screwdriver, pneumatic drill, manual screwdriver and other hex tools. Applicable Scenarios: Suitable for most electric drills, rechargeable drills, manual wrenches and drive chucks.