Traxxas replacement parts set for the Sledgehammer, Hawk, Hawk22, Rad 2, Nitro Hawk, and Nitro Buggy. This Package Includes: (2) 3X45mm Screw pins (2) 3X35mm Screw pins (2) 3X30mm Screw pins (2) 3X27mm Screw pins (2) 3X20mm Screw pins Screw Pins are "hinges" for the suspension arms. These are almost totally unthreaded screws except for 3 or 4 threads directly under the head of the screw