Allen string loops. I put one on and went out to shoot and first time i pulled back it broke at mid draw. Ive never been hit in the face as hard as i hit myself when it broke. My loop dident come untied, IT BROKE[:@][:@][:@]But i have a friend that swears that the allen $10 dollar realses are the best money can buy. And ill have to say that he has been shooting bows for quite a few years and only one has worn out. He just got a new one lastyear after about5 years with his first one