Product Description The Brunswick Bionic XF Wrist Positioner provides you control to the amout that you cup your wrist and the lateral angle that you position it. Made of light weight aluminum, the Bionic XF Positioner can help keep you wrist locked in a strong position throughout your release.The extended index finger option provides maximum support and rotation potentialDurable aluminum constructionLight-weight for maximum comfortProvides options for multiple wrist cup and lateral positions1-year limited warranty