The HT PRO, The Pro's Choice Micro-Adjustable back tension release. The HT PRO is made of solid brass and weighs in at .32 ounces vs. the HT's .12 ounce. The micro-adjustable head allows you to set the heat and fine tune your release to your preference. The HT PRO is available as 3 finger model in your choice of medium or large designs. All handles are also tapered near the ring and pinky fingers for ergonomic feel.