I bought a few of these guys for clip and leave purposes. They are strong and not too expensive. Plus I have seen some of the gear left by climbers and if I have any choice at all, I will not run my ropes through other peoples gear...too much at stake for me to trust someone elses gear that they left behind. These guys are smooth, round, and wide. Perfect, in my opinion, for a rope to run through. And if for some reason you can't make it up to collect them, they are not too expensive to leave behind. Simple and Great!