Keyed light switch - GIF

Keyed light switch.

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Previously:

https://www.homemadetools.net/forum/...927#post133695
https://www.homemadetools.net/forum/...947#post124955
https://www.homemadetools.net/forum/...163#post161122

Now there is someone serious about having control over everything.

More 'secure' than many keyed light switches used for testing emergency lighting fittings.