The Fin Box Lock is designed to fit in most standard SUP and Surfboard boxes. You can use this most of the time with the fin in or out!
Insert part 1 first into the box (part 1 has curved top and bottom)
Then insert part 2 on the flat side of part 1 and the holes will line up
Insert cable or lock inside of the hole.
Please Please Please remove the Fin Box Lock before going out on the water. The Fin Box lock is designed to be use on land only. Lock to your car,truck, van, tree, bike or best friend.