I have the other Yamaha clutch (LC810) but wanted to try this. The difference is this one has drum key tightened locking nuts, which I figured made sense as my current hi hat clutch does sometimes loosen during play - which can be a real pain.
This one can be locked in place but I find it a bit fiddly, initially I thought I'd got it wrong and they were just to adjust for different cymbal thickness but after messing with it (I realised I hadn't wound the lowest locking nut high enough up the thread...) it's now locking. however, no matter how hard I tighten the top one, it still seems to spin... I'll mess with it some more
It's a good clutch and I'm currently using it on my flats practice kit at home.
Typical Yamaha quality and a good price from Thomann