These mounts are made to be welded directly to the axle tube. This is a super strong CNC bent, Laser cut bracket made to take serious abuse. Perfect for a three link or four link suspension system.  These are made to be attached to your axle and have an inside width of 2 5/8" to accept common Johnny Joints. We offer three different mounting angles so that you can mount your Johnny Joints in a neutral position to maximize axle articulation.  Like all of our products, they are made in the USA from USA steel.