THE ROLL MASTER SYSTEM TM is a Roll Tarp System for all applications, a simple one-step Roll & Lok operation. No need for ratchets & straps or any other tie downs. The Roll Master System TM is held in place by an aluminum lok-rail. This rail can be installed on either the driver or passenger side, depending on your loading requirements. All hardware is made with aluminum or steel plated parts, for years of trouble free service. Our standard width roll tarps are made of our one-piece 18oz vinyl material. This seamless tarp eliminates welds in the tarp material, and makes our tarps smooth, straight and trouble free. Best Tarps is your one stop shop for all replacement roll tarp parts and the best replacement tarps in the industry.