Simply bolt it to the wall and place your caravan hitch on to the ball, lower the sliding mechanism onto the top of your hitch and secure this in place with 2 padlocks into the holes that match up.
Pictures show how (rectangular / shutter) padlocks cannot be cropped also there is the added anchor point for a chain should you want extra security or secure any other items.
Can be used in conjunction with other hitch locks where the hitch lock does not cover the hitch were the tow ball goes in as shown in some of the pictures.
Fully galvanised so no rusting, chipping or flaking issues.