While this product looks neat its functionality is at best a luck of the draw. The prod tips ( the plastic ends that you attach the string to) are extremely flimsy, and if they don't break on the first shot (like mine did) they will probably break soon after. When I inquired about replacements I was told that they didn't sell parts but that I could purchase more bolts if I wanted. Seeing as how my crossbow was obviuosly not working I thought this was an asinine suggestion. 1 star