Description Features 1High Strength Material: Ball joint is made of alloy material with precise forging and hard oxidation treatment, ensuring excellent wear resistant and maintaining long term stability even in extreme operating environments and extending service life. 2Precise 7.0mm Ball Diameter: The 7.0mm ball diameter accurately match most model car accessories on the market, ensuring tight connection without gap after assembly, enhancing steering and suspension system response speed and accuracy for better control. 3Wide Compatibility: Designed with standard M4 thread interface, compatible with various 1/10 scale model cars for easy replacement of stock ball heads. Without additional modifications, simplify the upgrade process. 4Clockwise Thread Design: The clockwise thread design that fits most model car assembly habits, making installation easier and quicker without the risk of damage from incorrect rotation, suitable for both experienced hobbyists and beginners. 5Cost Effective Set: Each set includes four pieces, meeting the replacement or upgrade needs of multiple parts in model cars, offering better cost efficiency compared to individual purchases. Item Type: Metal Ball Joint Material: Alloy Package List 4 x Ball Joint 4 x Nuts