These Spring Perches are made for Early CJ & M series Jeep width (1.75" - 2.25") Leaf Springs, there is no compromise in their construction they are just a fraction narrower and made to fit the 2.5" tubed Dana 30 and 35 with a little fine tuning they can easily go on 2.75" Dana and AMC axles. They have 3 mounting position options for those of you that want a little more or less WB. These are .25" (1/4) thick HR P&O Steel Plate, CNC Laser cut and CNC 290 ton Brake bent. Sold in pairs