The square pin safety pin square lock pin spring pin is an essential accessory for securing your trailer hitch. Designed for heavy-duty applications, this pin ensures that your trailer remains securely attached to your vehicle. Simply insert the pin through the hitch receiver and lock place with the spring-loaded mechanism. This provides a reliable and secure connection, preventing accidental detachment during . Features -Color:Silver -Material:Carbon steel -Size:7.80X5.00X1.20cm/3.07X1.97X0.47in -Nominal diameter: 10 mm -Reliable material: these coupler are reliable and resistant to wear, ensuring performance -Multifunctional design: these are versatile and can be used to secure and connect various components, making them highly practical -Safety and reliability: the safety pin design ensures a secure connection, preventing accidental disconnection during use -Square lock pin: the unique square design provides better locking performance, ensuring that the pin stays firmly in place -Spring loaded pin: the builtin spring offers additional fastening force, preventing the pin from loosening over time Package list: 2 x Spring