The ProTone Fitness Machine is uniquely designed to provide the ultimate workout for those with limited mobility and gripping capabilities. It's sliding and hand crank adjustments with no grip locking knobs and handles allow for easy manipulation and adjustment by individuals with disabilities. The sliding weight sled allows individuals to devise a workout specifically geared towards their own capabilities easily and without assistance from others. The ProTone provides a great workout without weight plates, but we include two (2) ten-pound weight plates for those needing a more demanding workout. Many of the industries standard weight plates that you may already have on hand, may also be used. Made of a powder coated stainless steel construction, this fitness machine is durable enough to last for years to come. It features 316 stainless steel Hardware, no-grip adjustment knobs, durable sealed bearing pulleys, self-lubricating bronze bushings and self-lubricating bronze bushings. The ProTone is an ideal solution for both residential and commercial applications. Use it at rehabs, hospitals, gyms, colleges, fitness centers, as well as private residences. Commercial quality fitness equipment at a home gym price!