The Tru Fire Hurricane release has a no stretch buckle closure. The jaws open when trigger is depressed and close when archer lets up on the trigger. Patented free floating, self centering steel roller does not slide over but rolls along inside of jaws for smooth operation. The heat treated and Teflon coated jaws will not mar your strings. The trigger pressure is adjustable as is the length and has 10 hole adjustment for a custom fit.