1、Hard steel adapter for maximum durability, the heavy-duty construction allows for long service life 2、Ball detent design for quick connect or disconnect and ensuring stay in place while driving 3、Universal 1/4inch hex shank would fit many electric drills and screwdrivers 4、The small size allows you to bring your extension adapters anywhere to get any job done and can fit into many tool bag 5、There are three hex square adapters in different sizes and you can use the proper one for various needs Description: These extension adapters are made from high quality chromium-vanadium steel with heavy duty construction to ensure maximum durability. It can be used on drills and screwdrivers and change them into a socket wrench, making these extension adapters very handy and multipurpose. Features: Hard steel adapter for maximum durability, the heavy-duty construction allows for long service life. Ball detent design for quick connect or disconnect and ensuring stay in place while driving. Universal 1/4inch hex shank would fit many electric drills and screwdrivers. The small size allows you to bring your extension adapters anywhere to get any job done and can fit into many tool bag. There are three hex square adapters in different sizes and you can use the proper one for various needs. Specifications: Material: Chromium-vanadium steel Length: 150mm / 5.9" Type: 1/4" square head------1/4'' hex shank 3/8" square head------1/4'' hex shank 1/2" square head------1/4'' hex shank Quantity: 3 Package Includes: 3 x Hex Square Extension Adapters