Originally Posted by moxfyre
There *is* no master link on Shimano chains

I would've thought that was the reason you bought an aftermarket link!
I don't know why Shimano does not offer a masterlink in their chains. Initially (5+ years ago), I switched to SRAM chains because of the powerlink feature, and I will never go back to a Shimano chain (unless they offer a master link feature). Too many pros with the SRAM Powerlink.