Accessories:REAR LOWER ARMS-2PCSSST ROUND HEAD SCREWS 3*14-2PCSManual number:ARR330516Product major function & usage:Support the chassis and stabilize the rear knuckleMajor advantages of upgrading to this product:1. Aluminum 6061 T6 material made for better strength, tolerance and more elastic. The delrin collars are inserted into the arms to minimize the play and strengthen the fitting.2. Multiple positioning holes for users to adjust the angle of the dampers.Other special notes and comments:suitable for ARRMA GRANITE - ARR102665 , ARR102676