Easy to use: Spring-loaded bolt can be locked in the open position as needed. Made of heavy steel, durable and corrosion resistant. Suitable for outdoor use. Widely Application: For Trucks and Trailers. Universal long spring lock. It is a good helper in your life. If you have any questions about the product, please feel free to contact us. Spring Latch Lock, Universal Weld-On Spring Latch Assembly With Plain Tube,Trailer Gate Latch, Spring Loaded Bolt