Frame sliders, also called frame protectors, fairing protectors, or crash bobbins, are an accessory used on street motorcycles for the purpose of maintaining the bike's side fairings and internal components in the event of a crash, or preventing damage from dumping (dropping) the bike. They are made of plastics such as Delrin, acetal, or nylon, or sometimes aluminum. The frame sliders are usually located and installed on the engine bolts on the left and right side fairings.