Traxxas pivot balls for the T-Maxx are constructed of hard anodized aluminum. 7075 T-6 aluminum. Optional Pivot Balls for the Traxxas T-Maxx 4WD Radio Control Monster Truck. Pivot balls are installed through the upper and lower suspension arms and axle carriers and allow camber adjustment of the wheels. INCLUDED: Four hard anodized 7075 T-6 aluminum pivot balls. Four ball cap bushings.