This is a reusable tool that is used at the 12, 4 and 8 o’clock positions when mounting the tires. Once the wheels have been mounted, the three centering pins are removed. The pins are made of hardened steel to ensure durability and threaded inside for proper alignment and easy removal of the tool. One set includes three centering pins. We offer various sizes to accommodate steer and drive wheels as well as most trailers. Read the description and product specifications below to choose the centering pins that meet your needs.Steel & Aluminum WheelsSteer & Drive Axles Fits Some Trailers 5″ Pin LengthWill Center 1″ Brake Drum Reuseable Shop ToolHardened SteelSold In Sets of 3Storage Case Included