TuffStuff Proformance Plus – Commercial Power Racks & Cages are availabe from Commercial Fitness Superstore, Arizona’s best source for one of the most basic and popular pieces of equipment in your fitness facility. Commercial Power Racks and Power Cages are designed to allow free weight lifters to workout safely and effectively without the need for a spotter. Commercial Power Racks and cages are an essential piece of equipment for any fitness facility catering to athletes, bodybuilders and power lifters.