Just a comment. I have one of those in my TJ. It has been very useful but…..
1) It rattled incessantly. The latch is not sufficient to prevent that. I largely fixed the problem by attaching a rubber block to the rear of the tailgate that presses against the drawer when it is closed.
2) The drawer rails are insufficiently strong and will wear out if you carry much in the drawer. I am on my third set.
3) It is unbelievably heavy, heavier than it needs to be.
4) It is rated for 350 lbs. Don’t even think about carrying more than 100 lbs in the drawer! It will break the rails. You can carry any amount of stuff you want on the top though.
Having said that, it has been an ok solution for me. Or maybe I should say the only solution I could find.