1/2" Ergonomic Head. Head swivels 360 degrees. Easy to open and close jaws. Completely silent. Finger bed grooves for added grip. Adjustable sensitivity screw. Maximum Safety! Use built-in lanyard to keep release from slamming through if it slips out of your hand. Maximum Draw Length! smaller head and smaller jaws for more length and more bow speed. Maximum Silence! Quiet when loading. Maximum Loading Speed! Activate trigger to open jaws, let up on trigger to close them.