Battery switch flush/panel mount

[rigi36]

Possibly a stupid question, but what tool do I need to mount one of these in a flat surface?

https://www.bluesea.com/products/110...witch_with_AFD

It says 91.44mm hole.

Is there an easy way to do this an keep it looking neat?

[Seafox47]

Easiest way is to drill a hole with a 94-95 mm hole with a holesaw. Mount it from the rear and use the 4 boltholes from the front to secure the switch to the service you are mounting it too

[ShinyShoe]

Or a dremel on a 45.7mm bit of string attached to a screw at the centre of said hole...

[Poly]

Ah, we've not had a hole drilling thread for ages...