Description Description Square wire shaft lock pin: The package includes 8 locking pins; 1/4 inch (6 mm) in diameter, shank length: 2-3/4 inches (70 mm), effective rod length: 2-31/64 inch (63mm), suitable for most quick release applications. Material: High quality, durable and sturdy carbon steel material, zinc plated to resist rust and corrosion, can be used for a long time for outdoor use even in the harshest conditions. Operation easy: These spring loaded locking pins are very convenient to use. Insert the safety pin into the corresponding hook slot and glue the end of the pin. Then the pin is firmly locked and will not loosen during use. Secure hold: This hitch lock pin provides a reliable solution for keeping the trailer hitch latch engaged with the trailer ball. The solid pin provides great strength while the retaining clip ensures the pin will not vibrate or click. Application: Shaft Lock Pin is for Agriculture, Gardening, Trucks, Boats, Trailer Couplers, Towing, Trailer Jack Wheel, Secures Hitch Latches, Pintle Hooks, secure ties or other locking applications.