Sidewinder STRAP ADAPTOR. Easily mounts to most any standard guitar strap and turns it into a hybrid, twist-resistant strap. Genuine leather, with all hardware made from high-grade polymers. Designed for maximum strength and durability, yet unlikely to scratch most surfaces.  Prevents strap curl.
This adaptor turns a normal strap into a "SIDEWINDER STRAP".  Patented design features a self-correcting swivel which ensures your strap will stay straight, every time you put it on.    Also see:   sidewinderstraps.com