KMC Missing Link 10: for 10 Speed Chain, Silver, Perfectly Connecting KMC, SRAM, Shimano Chains - Four (4) Pack

KMC links seem to always be good. If you've never broken a chain, you just haven't ridden enough. I think I've broken a chain 3 times but never because the chain was excessively worn. Always, always, always carry a spare link and chain breaker tool. It's a simple repair with the link but, well, just call for the sag wagon if you don't have one! (Not fun if you're 70 miles away from home!)