These are a pair of axle brackets that were never used. The mount will fit a 3" axle tube, or could be modified to fit different diameter housings. The lower link hole is meant for a 9/16" bolt. The bushing width is for a 3" wide bushing. The hole on the rear of the brackets was meant for a shock and also has a 9/16" hole. The side plates are 1/4" and the back plate is 3/16" material.