Traxxas 17 tooth steel clutch bell. This clutch bell attaches to the adapter unit on the crankshaft, mades contact with the clutch shoes and meshes with the main gear: Fits all Traxxas 1/10 scale nitro vehicles. Replaces worn or damaged clutch bells. Constructed of hardened steel INCLUDES: One Traxxas 17 Tooth Steel Clutch Bell Two 5mm x 8mm 0.5mm fiber washers Two 5mm E-clips