Suburban Replacement Anode Tube Spanner.
Do yo have a Suburban Water Heater in your Caravan or RV? Have you checked or had your Anode checked recently?
The anode rod can be located by opening the water heaters exterior access door. It is positioned in the bottom centre of the water heater control housing. The rod can be replaced easily with this purpose made Tube Spanner and by anyone with some "handyman" ability!