OTC CONTRL ARM TOOLOTC CONTRL ARM TOOLFeatures and Benefits: Removes the inserts on the upper control arm alignment brackets of light duty GM trucksFeatures an indexed forcing bolt that pulls straight and evenly, and works with off center knock outsNew and improved design has a self centering knock out for full punch removal with less tearThe tool fits 1989 2001 Chevrolet and GMC 1 2 , 3 4 , and 1 ton trucks, two or four wheel drive. Also works on 1990 2001 all wheel