4-Wheel Aligner is a professional testing device used to detect vehicle wheel alignment parameters and compare them with original factory standards for precise adjustment. It accurately measures key parameters including toe, camber, caster and kingpin inclination, widely applied in chassis maintenance, tire service and performance optimization for cars and SUVs. By precise calibration, it effectively solves problems such as vehicle pulling, steering wheel deviation and abnormal tire wear, improving driving stability, handling and safety while reducing fuel consumption and tire damage. With easy operation and high measuring accuracy, it is an essential high-precision equipment for auto repair shops, tire centers and 4S stores to ensure safe and economic vehicle operation.