Construction is of 2" square tube and a short piece of 3"x1.5" rectangle tube.
All the ends have been capped off and there is a locking pin. The raised diamond grate is great for a sure footed grip, just big enough for one foot.
There is a second locking position that blocks the door from being opened, just an added security feature for free while getting the step up for running the trails.
Has been working great and easily supports my 240 lbs. with no problems.
Miles