Why buy a tailgate lock?
The tailgate is one of the easiest parts or your truck to steal. In a matter of seconds it can be opened and removed.  It also has a very high replacement value as far as your insurance is concerned. The tailgate replacement cost can be between $600.00 to $1200.00.  The tailgate is designed to keep all your are hauling in the truck bed compartment.  Vehicles to furniture to personal items are usually safe if the tailgate cannot be opened.  It is also a great additional lock for some styles of bed covers.
The tailgate lock serves several purposes.  It is a deterrent from tailgate theft as well as  as well as protect the contents of the truck bed.  In many cases the cost of the tailgate and/or the loss of contents from the pickup bed can be in the thousands of dollars.  The cost of one dinner, which is more than the cost of a tailgate lock, is the best protection you can buy.