This spring brake is a genuine Midwest Engine part that can be used as a replacement part for outdoor appliances with small engines, including lawn mowers, chipper shredders, snowblowers, and other such appliances. Spring brakes are a braking system employed a large, coiled spring that is kept under high tension; the control valves attached to the spring brake are the mechanism by which the spring brake is released.If the spring brake has been damaged, is malfunctioning, or is in a state of disrepair, this will manifest in the form of a sudden, volatile eruption from the air brake chamber. This is a dangerous state for a small engine, so repair should be conducted immediately. Additionally, a new spring brake part should be ordered before any attempt to use the appliance without a proper repair. Remember to always wear gloves when handling, repairing, and operating outdoor equipment, and stay safe around the small engine of the appliance if the spring brake has malfunctioned and caused a dangerous situation.This spring brake is compatible with the brands Briggs and Stratton, Cub Cadet, and Toro.