I was looking at some pictures on the Pendlay website and couldn't figure out how the collars attach to the bar. Most cheap bars have a socket-head screw at each end, which I assume screws into the bar to secure the collars. What about higher end bars? Here are the pictures I was talking about: ^^^ Are those ends threaded? If they are, then a cap could just go on the end. I see a slot for a snap ring as well. That can't be the only thing holding the collars on? I guess there isn't much axial load to worry about.