1、Adopting chrome vanadium steel material, the socket adapter is of high harness, strong strength and long durability. 2、The spring loaded ball bearing makes the adapter holds the socket firmly. 3、1/4inch hexagonal shank is suitable for all quick change chuck and standard drill chuck. 4、A great tool to change the hexagonal size into square size, convenient for the installation of socket. 5、 It can be installed on the pneumatic screwdriver, electric screwdriver, electric drills and more electric tools. Features: 1. Adopting chrome vanadium steel material, the socket adapter is of high harness, strong strength and long durability. 2. The spring loaded ball bearing makes  the adapter holds the socket firmly. 3. 1/4inch hexagonal shank is suitable for all quick change chuck and standard drill chuck. 4. A great tool to change the hexagonal size into square size, convenient for the installation of socket. 5. It can be installed on the pneumatic screwdriver, electric screwdriver, electric drills and more electric tools. Specifications: Material: chrome vanadium Steel Adapter size: 1/4", 3/8", 1/2" Overall Length: 65mm/2.56in, 65mm/2.56in, 73mm/2.87in Weight: Approx. 91g Package Included: 3 x Socket Adapter Note: 1. Due to the difference between the monitors and light effect, the picture may not reflect  the actual color of the item. 2. Please allow small deviation due to manual measurement. Thanks for your understanding.