Armordillo 7171619 Polished 4" Oval Step Bars For 99-16 F-550 SuperCrewArmordillo 4" oval side step bars from Armordillo will give you the best of both worlds an ergonomic and attractive design, and a durable construction. Oval shaped for added resistance to bending and flexing, these side steps feature an anti slip pads for convenient and safe access to your cab in dry and wet weather conditions. Each step is engineered and designed to your exact vehicle specifications, providing an extended tire coverage for more