Description: _x000D_ These bit holder and extension adapters are made from high quality 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. _x000D_ _x000D_ _x000D_ Features: _x000D_ Hard steel adapter for maximum durability, the heavy-duty construction allows for long service life._x000D_ _x000D_ Ball detent design for quick connect or disconnect and ensuring stay in place while driving. _x000D_ Universal SDS plus shank would fit many electric drills and chuck. _x000D_ The small size allows you to bring your bit extension anywhere to get any job done and can fit into many tool bag. _x000D_ There are one hex socket and three square adapters in different sizes and you can use the proper one for various needs._x000D_ _x000D_ _x000D_ _x000D_ Specifications: _x000D_ Material: Stainless steel and chromium-vanadium steel _x000D_ Type: SDS Plus--80mm x 1/4" hex socket, _x000D_ SDS Plus--65mm x 1/4" square head,_x000D_ _x000D_ SDS Plus--65mm x 3/8" square head,_x000D_ _x000D_ SDS Plus--75mm x 1/2" square head_x000D_ _x000D_ Quantity: 4 _x000D_ _x000D_ _x000D_ Package Includes: _x000D_ 1 x Hex Socket Extension Adapter_x000D_ _x000D_ 3 x Square Extension Adapters