Put 4 sets of these on my trailer for my latest project. Took two days to get done. Had 4 quarter inch thick steel plates cut ($75 !) for backing plates on the rear chocks. Drilled, cleaned and painted the plates before installation. Kind of a pain to drill all those holes in my new trailer and assemble and torque all the grade 5 hardware, but in the end my Pioneer 700 isn't going anywhere. I like having that peace of mind.
Barn
Barn