For the better safety of a driver or operator, agricultural tractors and self-propelled machines are equipped with protective structures: Roll-Over Protective Structures (ROPS); Falling-Object Protective Structures (FOPS). "Wheel chocks are also used on a car, truck or other vehicle to prevent it from accidentally moving. ROPS/FOPS should be periodically tested for its functionality.If any default found then Rops & Fops repair is very important. Rops & Fops Cabs are a metal frame that surrounds the operator’s seat and protect them from being crushed if the tractor overturns. More from us - BEST WHEEL CHOCKS FOR HEAVY DUTY TRUCKS