B3 ROOK RELEASE FLEX CONNECTOR OD GREEN The Rook Swivel is a proprietary design featuring a stainless steel load jaw and an anodized guide jaw. This system gives you the accuracy of a single jaw and the simplicity of a dual-jaw. The Rook Swivel also features a curved trigger and shape of the Rook is unique to B3, it has an hourglass shape that will give you some more leverage to get your bow back in a hunting situation.