Applicable Models: Upper and lower ball joint kit fits ATV UTV 400 450 500 550 700 750 800cc models and is compatible with all front steering knuckles. Compatible With: Designed as a replacement for HiSun, Massimo, Bennche, Cub Cadet, Coleman, TSC, Rural King, Yardsport, SuperMach, Big Muddy, Qlink, and other compatible models. Function: Helps resolve issues such as abnormal front suspension noise and excessive front-end vibration, improving vehicle performance. Driving Safety: Helps prevent uneven tire wear and steering instability, enhancing driving safety. Ideal replacement for worn or damaged ball joints. Durable Construction: Made from rubber and steel alloy materials, offering resistance to wear and rust for extended service life. Specifications: Item Type: Ball Joint Kit Material: Rubber + Steel Alloy Thread Size: M12, 12mm / 0.47in Quantity: 4 pieces (2 upper + 2 lower) Application: Replaces original ball joints to address front suspension noise and vibration issues. Package List: 2 x Upper Ball Joint 2 x Lower Ball Joint 4 x Washer 2 x Pin