Bullet Nerf Bars are an attractive alternative to the traditional running board, for ease in climbing into or out of taller vehicles. They have a sporty streamlined appearance that appeals to many who drive larger vehicles, such as pickups and sports utility vehicles. They are stainless steel, or aluminum tube side steps, typically equipped with non-slip step pads. They are often available in a polished mirror finish, a black powder coated finish, or chrome. They are available for most of the pickup trucks and sports utility vehicles that are popularly driven today. They are most commonly available in standard 3-inch diameter, but are ... available in a heavy-duty 4-inch diameter.