Broad compatibility Designed to mount standard hex bolts and nuts and provides a seamless connection with 1/2 inch or 21 mm hex wrenches. This wrench extension tool offers versatile compatibility across tools and applications. Wide applications Commonly used in automotive maintenance and mechanical equipment installation. Suitable for both professional and home repairs, easily adapting to a variety of scenarios. Easy to use Features a quick plug-in interface that expands your tool set, improving workflow efficiency and saving time when swapping tools. Simple, straightforward operation for continued productivity. Durable and safe Constructed from high-strength alloy steel for enhanced durability and longer service life in demanding environments. Excellent wear and impact resistance makes it suitable for heavy-duty industrial use. Use scenarios - Under-vehicle maintenance where space is limited, enabling access to hex bolts and nuts that are hard to reach with a standard wrench. - Mechanical equipment installation in workshops or factories, facilitating mounting and assembly tasks. - Home projects such as bike or furniture assembly, or equipment maintenance that involve standard hex fasteners.