Ooh, I think I may need to get myself some of these. I'm forever over-tightening things. Full disassembly and cleaning of some of my tanks take twice as long because I spend half the time twisting things trying to get them to come apart...
Received mine! They're great - exactly the sort of thing I needed, and certainly beats having to get the pliers out and wrapping the teeth so as not to scratch the metal or glass.
Thanks very much chainmaker, a simple yet brilliant idea that's come into use a couple of times already!