We've been getting asked by customers and bow companies about the best solution for taking vibration out of the bow riser itself. After extensive testing and the development of the monsterjax, the R&D department at Bowjax has come up with the new RizrJax. Rizrjax come with two monsterjax dampeners that are attached by a machined screw through a hole in the riser. Rizrjax will calm that previously untamed bow. If you've got a bow with some vibration, throw on some RizrJax and notice the difference.