This is the optional Tekno RC M6 Driveshaft Kit for the Traxxas 2WD Slash, and Nitro Rustler and Stampede. FEATURES: Reduces slop and increases durability, compatible with stock wheels and nuts-no modifications needed Custom 6mm stub axles-no more bending or breaking Larger bearings for better load handling-10x15x4mm inner, and 6x12x4mm outer bearing (stock is 5x11x4mm inner/outer) Hardened steel driveshafts and drive cups Captured CV drive pin 1, 2, 3 and 4° settings available with the 0.5 and 1.5° rear hubs INCLUDES: Instruction Sheet Four 6x10x2.5mm Shims Two each- 1.5° Nylon Hub Carriers 6x12x4mm Bearings Hardened Steel Drive Cups Nylon 12mm Wheel Hexes 0.5° Degree Nylon Hub Carriers 10x15x4mm Bearings Hardened Steel CVAs jxs 11/11/10 ir/jxs