Only used them on a SRAM chain, so this might not help but for what it's worth putting them on is a doddle (though so is using a normal shimano pin on a shimano chain) Taking them off is ... well, I can't do it, try though I might.
I'm sufficiently incompetent that even when I've got the chain off (by treating it like a normal chain and punching out a normal rivet) I still can't undo the damn powerlink with any combination of fingers / pliers / prayer that I've yet found!!!
I fully understand the theory (I believe) and you'll find a zillion videos on youtube showing you how to open them. I suspect once one has been on and off a few times they're easier, and / or there's some magic technique but I don't take my chain off to clean it, so the only time the link gets used is either to change the chain, or if something catastrophic happens.
If you're out and about and your chain breaks, a spare powelink would help you put it back together. Seems to me though that you'd still need a chain tool (to remove the plates from the disconnected link thus letting you put the powerlink in), so if that's the case, why not just have a spare shimano link?
I'm sure you'll find people who can explain why they're such a good thing.
Garry H wrote:
Yes, it fits fine. But, as the post above says, it's not really designed for re-use, although it can be undone with pliers.
I cut a piece of a wire coat hanger into a U shape so that its a slide fit around the link
Squeeze this with the pliers and it flys off