Do you need to stretch out your D-loop on your bow string? Check out these D-loop pliers from Outer Limit Archery. These pliers are the most advanced D-loop pliers on the market. Its patent pending design does things that other pliers cannot. The Stretch D Loop Pliers multi feature design aids in the complete process of installing a D loop. It gives you the shortest D loop possible which can lead to bow speed increases of 3 to 5 feet per second.