Enhance your towing safety with the square pin safety pin square lock pin spring pin. This versatile pin is suitable for securing trailer hitches, ensuring that your load remains stable and secure. To install, simply slide the pin through the aligned holes of the hitch and receiver, then lock it with the spring-loaded latch. This easy-to-use design makes it a reliable choice for all your towing needs. Features -Color:Silver -Material:Carbon steel -Size:7.80X5.00X1.20cm/3.07X1.97X0.47in -Nominal diameter: 10 mm -Practical material: these locking coupler are made from carbon steel, offering exceptional durability and wear resistance -Multipurpose use: suitable for a wide range of applications, these can be used to secure trailer hitches, couplers, and other parts -Reliable safety pin: the safety pin design ensures a secure connection, minimizing the risk of accidental detachment -Square design advantage: the square lock pin design enhances the locking effect, ensuring the pin stays in place under various conditions -Spring enhanced security: the builtin spring provides additional locking force, ensuring the pin remains tight and secure during use Package list: 2 x Spring