These are for my boys to have armrests and to tie down things if needed. very simple and are removable . 1" square tube, bolts welded into the down rights and nuts ran from under the bed lip. thanks Attached ImagesJobSmart MIG125Lincoln AC225-SLincoln Pro-Mig 175Dewalt GrindersRidgid ChopsawIR Garage Mate CompressorAny thing worth doing, is worth doing right.