" Screwfix emailed asking me to review this - and there's not much you can say.
It does the job perfectly, it was inexpensive, it's made of brass and it's a bit shiny (so there's a Lord of the Rings Precious feeling about it) and it's left my central heating system working perfectly.
If you could add something then it would be a method of fitting it to a keyring or chain so that it can live with all the other weird doohickies you need for modern life!
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