DUAL LOCKING SYSTEM: Featuring a robust quick-release locking mechanism complemented by a secondary twist lock, this extension offers enhanced security. It prevents accidental bit release, ensuring your work is both safe and precise under various conditions. IMPACT-RATED DURABILITY: Built to withstand the rigors of use with impact drivers and standard drills, this extension features an impact-rated 1/4-Inch hex shank. It's crafted for durability and resilience, making it an ideal choice for heavy-duty applications. ENHANCED GRIP AND CONTROL: The textured twist lock and ridged quick-release button are designed to provide a firm, reliable grip. This feature is crucial whether you're working with gloves or without, offering control and comfort during use. EXTENDED REACH: Experience the convenience of a 12-Inch (305 mm) impact extension that is perfect for accessing fasteners in tight or hard-to-reach spaces. QUICK-CHANGE CAPABILITY: Designed for efficiency, this extension allows for fast bit changes while maintaining secure retention during high-torque applications., Weight: 174.5 pounds, Manufacturer: IJSDNVJNDX