Ensure the safety of your trailer with the square pin safety pin square lock pin spring pin. This heavy-duty pin is designed to keep your trailer hitch securely fastened. To use, align the hitch and receiver holes, insert the pin, and secure it with the spring-loaded latch. This mechanism provides a strong and reliable connection, preventing accidental disconnection and ensuring a smooth towing experience. Features -Color:Silver -Material:Carbon steel -Size:7.80X5.00X1.20cm/3.07X1.97X0.47in -Nominal diameter: 10 mm -Practical use: made from carbon steel, these are reliable, wear resistant, and built to last through heavy use -Multifunctional utility: these are ideal for securing trailer hitches, couplers, and various other components, making them highly versatile -Secure design: the safety pin ensures a secure and reliable connection, reducing the risk of accidental disengagement -Enhanced square lock: the square lock pin design provides better locking capability, ensuring the pin stays firmly in place -Spring loaded security: the builtin spring mechanism adds extra fastening force, preventing the pin from loosening and ensuring a secure fit Package list: 2 x Spring