A spreading device designed for adjustment of camber and or caster on vehicles with control arms. The tool has a housing with fingers that extend from the top of one end of the body. A bolt passes through a hole in the housing. A foot is attached to the bolt. The foot has a tongue that extends out the top of the housing. The tool is placed between the vehicle's frame and a control arm. The bolts that retain the control arm are loosened. The threaded rod on the tool is then tightened causing the control arm to be pushed away from the frame. Once the desired steering angles are reached, the control arm retaining bolts are tightened and the tool can be loosened and removed. If two tools are used it is possible to adjust caster without affecting camber or to adjust the camber without affecting the caster.