Holes on the drop down locking pin and mounting holes to close together for supplied washers (2) to be used.. Kit should supply a small plate with the 3 holes to mount under deck.. Easy enough to make yourself,
Chock is not as easily removable as advertised. Pin is a little large for the pre-drilled hole. I had to drill out the hole to make it work. Still a nice chock. I would recommend buying the 5.5 instead of the 3.5 for flexibility.
These work great. I like being able to lock my bikes up in the truck now when we go on out of town trips and stay in a hotel. I used to use a long chain, this is easier and plus is another anchor point. The hardware (bolts) that came with it are too long for my 2015 Silverado. These would work great in a trailer!