Includes: -Two (2) aluminum blade grips -One steel tail rotor hub -Two (2) radial bearings -Two (2) thrust bearings -Two (2) lock nuts -Hardware included Requires: -Loctite all screws when assembly Weight: 20.8g Usage: -T-REX 500 helicopters Instruction: -Include in the package Features: 100% Precision CNC machined Aluminum Equipped with thrust bearings and radial bearings Very light weight and stylish design. Very precise to reduce and eliminate all play in the tail rotor system Hardened steel tail rotor hub Lock nuts for tail rotor screws are provided for extra safety