Trail Gear?s Hi-Lift Jack Mount is laser cut from 3/16? thick steel and then CNC formed. The ends of the mount are coped so that they can be welded to 1-3/4 inch tubing. We use a 1/2 inch thick bolt that has a precision hole drilled into it so that a hair-pin/cotter style pin can be inserted. This will keep the nut from rattling off and ensure that you never lose your hi-lift jack on the trail. We also added rubber pads that go between the jack and the mounts and a Velcro strap to hold the handle in place so that no vibration will be heard from any of the mounting locations. A second hole was placed on the mount so that you can put a padlock on the hi-lift to keep it totally secure from loss or theft. Product is shipped unpainted, must be welded on.