These are the stock Dogbones for the HPI Savage Truck. These are also referred to as swingshafts. FEATURES: Steel construction, black in color YOU WILL RECEIVE: Two stock Dogbones for the HPI Savage Truck SPECIFICATIONS: Ball Diameter: 0.35" (9mm) Length: 4.8" (123mm) REQUIREMENTS: Installation on vehicle. jxs 6/20/03 ir/jxs &