BT PRO RELEASE BRASS The BTPRO is one of the most advanced releases in the back tension line, and features a patented micro-adjustable sear system. Simply adjust the sear for more or less travel with the use of a hex key. The BTPRO is a solid brass handle that provides weight and balance for a smooth rotation. It also has all new geometry for leverage that is built in for shot-to-shot repeatability and an auto-return hook for fast and easy release reset. The handle also features our patented star drive system, which allows for a three or four finger shape with multiple positions available. Included are four unique pelican sears to find the exact optimum setting for each archer.