Im getting some massive 5 inch by 9 inch industrial shackles for $5 bucks a piece. I want to make sure they don't grow legs. Is there any way to lock the pin that goes through the two ends? I don't want to weld the pin on and weld that to my bumper because I want to be able to put a loop through it instead of a hook. Thx, Ill have pics of my new rear bumper and shackles tomorrow.