The Metal D Loop Archery Bow Release with U Nock Combination Aiming Ring is made of lightweight and durable aluminum alloy material, providing accuracy and consistency during shooting. It fits for compound bows and stops arrows from falling off strings, increasing accuracy and consistency by improving arrow flight. The small and light design increases arrow speed and eliminates cables, making it easy to install and use with a release for better shooting performance. Features 1. Designed for use with shallow engagement type releases. 2. Easy to install with screw and use with release will have good performances during shooting. 3. Durable aluminum alloy material, lightweight and easy to use, fits for compound bow. 4. Stop arrows from falling off strings, increasing accuracy and consistency by improving arrow flight. 5. Light and small, which increases arrow speed and eliminates cables. Specification Material: Aluminium alloy Color: Black, Red, Blue Size: 2 x 2 cm Weight: 22 g Package Include: 1 Metal D Loop