Features Durable Hard Steel Construction: Experience maximum durability with a heavy-duty steel adapter designed for long service life and reliable performance in tough jobs Quick Connect Ball Detent Design: Easily connect or disconnect your bit holder with the innovative ball detent design, ensuring a secure fit while driving Universal Compatibility: Designed to fit most electric screwdrivers, drills, and chucks, this extension adaptor offers versatility for all your drilling needs Compact and Portable Size: The small size of this drill bit socket makes it easy to carry in any tool bag, ensuring you're always prepared for any job, anywhere Versatile Adapter Sizes Included: Includes one hex socket and three square adapters in different sizes, allowing you to select the right fit for various applications 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