Radius Arms are simple and they work! This bracket will allow you to mount a heim joint where the upper control arm on a radius arm suspension mounts to the lower arm. Having a heim joint in this location is critical to elevating the inherent binding issues of a radius arm. The brackets are made to weld onto a lower control are with a two inch outer diameter and give you a two inch inside mounting width with a 5/8" bolt hole. These are made from 3/16 100,000 min yield steel and are sold in pairs.