Buyers Products Heavy Duty Step/Grab comes in stainless steel, or chrome or zinc-plated steel. It meets to National Fire Protection Association (NFPA) specifications. The step is 5-1/3 in. by 6-1/2 in. and has a stainless steel spring to keep the step firmly open or closed as needed. The step is built to be used on emergency vehicles, work trucks, or other high-use purposes.