3 position OFF-SIDE-HEAD Plated steel 44m dia housing with Bakelite terminal plate with 3 spade terminal connections.
Mounts through a 14.5mm hole. Knob diameter 40mm. 40 amp current rating means you don't have to use a relay.
Front projection max 27mm. rear projection max 41mm. Max panel thickness 10mm.
ROTARY HEADLAMP SWITCH #ROSWHL2