
I bought this on purpose because the indicator light on our central heating wasn't on all the time. I used the thinnest wire and it was perfect for widening the hole, which solved the problem. In hindsight, I could probably just use 9 or 10 gauge electric guitar string to get the same result, but I'll definitely be using it on our stove, which has a larger hole, so I don't regret buying it.

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