1. Material: 50BV30 chromium-molybdenum steel 2. Forged with chromium molybdenum steel, sturdy and durable, wear-resistant and practical, multiple specifications design, flexible and applicable 3. Easy to install, this product is very simple to install, can be self-mounted on the bracket, without complex tools, easy to use 4. Ball bearings on each part ensure that the sleeve is firmly locked in place. 5. Application: socket conversion, can be attached to your tool ratchets and other square end threaded attachments 6. Weight: about 592 g
