Stainless Steel Mud Flap Hanger Set 2 1/2" Bolt Pattern with Oval Light Cut OutsMost mud flap hangers are made of stainless steel, though sometimes other durable metals are used. Some are straight, some tapered, and others are angled. Angled mud flap hangers typically come in 45 degree angle sets. All types are made to accommodate the different types of mud flaps on the market. PitStop mud flap hangers are especially easy to install, thanks to the included mounting hardware. Choose the style that matches your truck or trailers