- All-purpose compatibility: This wrench extension tool is designed to complement 1/2 inch or 21 mm hex wrenches and handle a range of hex bolts and nuts with reliable, effortless use. - Wide range of applications: Suitable for motor vehicle maintenance and the installation of mechanical equipment; supports professional machine repairs and daily home repairs. - Effortless operation: Quick plug-in interface enables fast tool changes, expands your tool set, and improves workflow efficiency. - Durable and safe: Made of high-strength alloy steel for durability and long service life; excellent wear and impact resistance for heavy-duty industrial use. - Use scenarios: - Vehicle maintenance tasks requiring hex bolts in recessed or hard-to-reach areas - Mechanical equipment installation and workshop assembly - Routine home repairs and DIY projects involving hex bolts or nuts