Features: 20mm quickly release Buckle, it can quickly secure and unfasten the Strap, makings it easily to carry and adjust. Crafted from metal materials, ensuring the stability and durability of the Buckle, it can bear test of combat or outdoor environment. The Strap Buckle have reliable fastening performances, ensuring that the Strap will not accidentally loosens or lose stability during activity. Easily to use, simply press the Buckle to quickly unfasten the Strap, makings it convenience for users to quickly operate and adjust. Can lockouts Into 8 Position with 360degree Rotations, and Stopped By Releasing Button to Control Positon and Movement, it can Prevents Swivels From Spinnings. Specifications: Material: Metal Color: Sand/Black Suitable for 20mm/0.79inch Rail Package Includes: 1set Metal Sling Swivels Mount note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.