Built with both a proprietary materials and design. The Whipper Snapper"s firing mechanism provides an extremely crisp trigger break that is one of the fastest in the industry. With single screw adjustability for both trigger tension and travel. Ergonomically designed for maximum comfort. Auto reload. Settings won"t change or wear just set-it and forget it. Designed for D-loop hookup. Available in open jaw or closed jaw. Available in 4-finger or 3-finger. Wrist strap accessible. 3 FINGER CLOSED NECK