Features Heavy-Duty Steel Construction: Crafted from hard steel, this adapter ensures maximum durability and a long service life for all your drilling tasks Quick Connect Ball Detent: The innovative ball detent design allows for effortless connection and disconnection, keeping your bits securely in place while driving Universal Compatibility: Designed with a universal SDS Plus shank, this adaptor fits most electric screwdrivers, drills, and chucks for versatile use Compact and Portable Design: With its small size, this extension bar easily fits into any tool bag, making it convenient to bring along for on-the-go projects Versatile Adapter Set: Includes one hex socket and three square adapters in varying sizes, allowing you to choose the right one for your specific needs Features: 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 SDS plus shank would fit most electric screwdrivers, drills and chuck. 4、The small size allows you to bring your bit extension anywhere to get any job done and can fit into many tool bag 5、There are one hex socket and three square adapters in different sizes and you can use the proper one for various needs Specification: Description: These bit holder and extension adapters are made from carbon steel and chromium-vanadium steel with heavy duty construction to ensure maximum durability. It can be used for drills and bits 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 SDS plus shank would fit many electric drills and chuck. The small size allows you to bring your bit extension anywhere to get any job done and can fit into many tool bag. There are one hex socket and three square adapters in different sizes and you can use the proper one for various needs. Specification: Material: Stainl steel and chromium-vanadium steel Type: SDS Plus--80mm x 1/4" hex socket, SDS Plus--65mm x 1/4" square head, SDS Plus--65mm x 3/8" square head, SDS Plus--75mm x 1/2" square head Quantity: 4 Package Includes: 1 x Hex Socket Extension Adapter 3 x Square Extension Adapters Package List