i ordered this and used it to set up a SRAM drivetrain, which included a SRAM pc1091r chain. i had previously used a SRAM powerlink when i set up the drivetrain, but i had to temporarily use a shimano FD with it as well. once my SRAM force FD was ready, i pulled the powerlink out and, since you're only supposed to use them once, discarded it and put the missing link on. here's where the confusion began: it went on VERY easily, but when i flexed the chain side-to-side where the missing link was, i could see its pins between its outer plates and the plates of the inner link it was connected to. that's how big the gap was between the ML and the chain's inner links. not good. so i checked the packaging: "KMC and Shimano chains only." which i thought was weird, considering the amazon listing says it works with 5.9mm chains and the SRAM chains are 5.95mm. "should be good" i figured when i ordered it. well, not so much... but, since i've never used a ML before and everyone says "they're supposed to go on and come off VERY easily; it's almost scary how easy it is" i figured maybe this was correct. i mean, the specs say it's right, right? it's not making any weird noises or shifting poorly when i have it up on the stand, running through gears. maybe it's ok? so, i tried going for a ride with it on there. about ten miles from home the ML got stuck on my big chain ring during a downshift and i got some massive chain suck between it and the FD. i had to move the FD to get the chain out, then re-adjust the FD on the side of the road, in fading daylight, in 35F degree cold. once home, i immediately replaced it with a powerlink, as i should have in the first place. should've known better when i saw those links flexing... so anyway, why am i giving it four stars? well, because it is a great product and it does do as listed, IF YOU USE IT WITH THE RIGHT CHAIN. shimano chains, these are great for. i've had them on a few shimano chains in the past and they're fine. but those are 6.1mm chains, not 5.95mm SRAM chains. also, PLEASE NOTE: in KMC's own technical docs they tell you that you should only re-use these 2-3 times per chain life. so everyone saying "i take it off once a week, soak the chain in kerosene, then rub finely diluted extra virgin mineral spirits into it with an extra-fine microfibre towel" (or whatever) are just as incorrect as the people who re-use their SRAM powerlinks over and over again (of which, there are many). both are violating the manufacturers specifications. and both have had little to no issues. so my guess is if you only re-use the links once or twice, whether you use ML or powerlink, i think you don't have much to worry about. just don't re-use it over and over and over again. oh, and make sure the link fits!
