■Product description: The Q-Fit (Quick Fit) series features a patented special shape that makes it easy to insert into an impact wrench using the C-ring at the end of the anvil tip. Adaptor converts 3/4DR (19mm) to 1/2DR (12.7mm) Includes pin and ring for fixing ■Product Specifications: Total Length: 2.2 inches (56 mm) Weight: 11.7 oz (320 g) Outer Diameter: 1.7 inches (44 mm) Insertion Angle: 1/2 DR (12.7 mm) Material: Chrome Molybdenum Accessories: Pins, rings ■ Caution: ※ For use with impact wrench. Please do not apply excessive torque. The prescription torque of the conversion adapter is based on the insertion angle of 1/2 DR. [Astro Products]