In addition to the steering shaft, Woodward also makes splined shaft inserts and U-joints to match. All you have to do is press the inserts into your three-quarter-inch tubing, weld it up and then slide it into the U-joint. Before, fabricators had to weld tubing directly to the U-joints. Not only is the heat from welding damaging on the bearings inside the joints, but it's also permanent. You have to cut your steering shaft in pieces to get it out. With Woodward's system all you have to do is loosen the set screws in the U-joints. Very neat.