Product Description Toggle Switch Boot Waterproof, protective boot to cover our toggle switch batt’s and helps keep water from seeping behind the panel from around the hole. This replaces the knurl nut that comes with the toggle switch.  Turns the stainless steel look into a blacked-out style as well. Super easy to install, just drop the switch in from the rear of the panel and screw this rubber boot on from the front.  It fits all of the toggle switches we carry. 15/32-32 thread.