360 degree rotating caliper head designed for left hand and right hand.Adjustable Wrist Strap with Sturdy Velcro,Comfortable around the wrist, you can adjust the length that what you want,it also works perfect for the small wrist and large wrist.Precision Trigger,when you get used to the touchiness of the trigger,it will help your accuracy at shooting to have a consistent release every shot,it helps stabilize your release in a noticeable degree,operates with a quick release.No More Fingers Pain,you can use the Archery Release Aid for bow shooting instead of fingers,prevent using fingers for bow shooting from getting pains which come from you use fingers for the bow to practice or hunting in the long time.If you get used to using the release aid with proper form and process,your aim skill will improve, it is supposed to be a surprise when the arrow releases.