Handbook amount: LOS234003This product includes :Tie Rod-2pcsStainless metal Round Head Screw 4x25-2pcsStainless metal Round Head Screw 4x30-2pcsStainless steel Lock Nuts 4mm-4pcsProduct major function & usage:Support and offer the back chassis1. The body from tie pole is manufactured by a light fat high tensile energy aluminum 6061 T6, ball ends are produced by POM for better strength and durability.2. Adjustable design utilizing clockwise and counterclockwise threads.