To be honest, after riding basically every typed of peg on the market, I think plegs are just a waste to be honest. Metal pegs slide just as well on rails and slide way better on waxed concrete. Plegs wear way faster than metal pegs and eventually plegs are going to snap. I don;t care if you hit it with a hammer 5 times or whatever, if you ride these for a couple months (truth is, they wont last that long because plegs where to fast) they are gonna break. Especially at the thickness these are. I know you are gonna say something about them being ultra-high-molecular-weight polyethylene, but Collin from tilt has tested that and they don't last very much better than normal pegs at all.