Tru-Fire's patented Universal Cushion Button will not gouge your release head or jaws like metallic nok sets, which may cause grooving and roughness to your head or jaws. This could cut your serving. The Universal Cushion Button fully eliminates this problem. By keeping the release off the arrow nock, you receive optimum arrow flight. Our Universal Cushion Button can also be used as a second Cushion Button, below the release, so the release will not slide down the bow string. Installation is quick and easy when you use the Tru-Fire Universal Crimping Tool.