First off I have to say a huge thanks to Thomann for such a great delivery service, quick, cheap and informed tracking from Europe to UK. Right, the wrench....almost all my guitars (15) have a toggle switch, 9 of those switches have a knurled collar which can only be unscrewed safely with this wrench, before purchasing this I was using pliers or an adjustable spanner, both of which can't get even a half decent hold on the collar so are prone to slipping off the collar and scratching the gituars' body, well no more my friends! this wrench has both metric and imperial sockets covering all my Japanese Matsumoku guitars and my USA guitars, its sturdy, comfortable and effortlesss to use, magnificent!
I generally really like allparts stuff and as a guitar tech I use a lot of it but this, well, it's not great. It worked ok for the first couple of times but the ABS type plastic they use isn't anywhere near hard enough and the serrated edge which grips the knurled switch nut will strip eventually.
I wouldn't really recommend it although there isn't a lot of other options out there other than a metal type fork tool which I'll try next.