Westin 21-23935 Black Pro Traxx 4 Oval Step Bar A mount kit is included with every application, so there's only one part number to order. The bold step pad design provides a heavy duty look and style. Choose Pro Traxx 4 or 5 inch steps for a wide and secure step area. Pro Traxx steps feature seamless domed ends, so there are no end-caps or exposed bolt heads. 30 degree OE style bends give the Pro Traxx dimension and appeal. No-drill applications make steps easy to install.