Dual function dolly is designed for Auto System (PCR Dock 'n Lock Dolly and Janitor Carts). Create a Tandem Waste Collection system add PCR Dock 'n Lock Dolly. UpCycle is the process of converting recycled materials into new products for better environmental value. SSS UpCycle items are manufactured in the USA using a proprietary compound derived from up to 100% post consumer materials, i.e. scrap tires and recycled plastics. The process saves energy, minimizes greenhouse gases, and diverts tires and plastic from the landfill.