The kits are specifically designed so that they can be assembled and installed by a hobbyist-level welder in their home garage without any specialty jigging equipment or welding tables. Instead, the vehicle itself is what acts as a jig. The bumper kit is started by bolting the main mounting plates to the vehicle frame and then building out from there, using the vehicle and a simple bubble level to get every lined up and nicely squared to the vehicle. For this reason, it is highly recommended to tack the bumper together with the vehicle present. Once the bumper is tacked together, the remainder of the welding and sanding can be finished without the vehicle.