The future of string silencer design is finally here. The Slipjax string silencers are made the slip in the string for maximum dampening ability. Additionally, Slipjax string silencers are some of the toughest string dampeners ever made. From bows that are below the 300 fps mark to those that are over 300 fps, these string silencers will last. For compound bow users that are looking for even more dampening ability, attach a Slipjax to your cable.