Accessories:Hex Adapter-2PCSSST Lock Nuts 4mm-2PCSM4x2.5x13 Screw Shaft-2PCSManual number:AR310779Product major function & usage:1. This part is 3mm thicker than original to widen the wheel tracks and enhance the stability of the car while driving.2. The lock nuts on the original wheels will not lock properly due to our increase in thickness of the hex. Therefore, thinner lock nuts are provided to secure the wheels properly.Other special notes and comments:SUITABLE FOR ARRMA GRANITE -ARR102665 & ARR102676