HIGH QUALITY MATERIAL: The safety connection pin is made of high quality carbon steel to ensure secure locking and durability. The surface is galvanized, with anti-rust and anti-corrosion properties, and it can be used outdoors for a long time even in adverse weather conditions. EASY TO USE: These spring lock pins have a firm and reasonable structure. Insert the safety pin into the corresponding hook slot, then secure the end of the safety pin. The strong pin provides sufficient strength and will not loosen during use. 1/4" DIAMETER SIZE: The square shaft locking pin has a diameter of 6.3 mm / 1/4 inch and a length of 70 mm, so for most connectors it can be inserted without any problem. DESIGN PROFESSIONAL: The drag connection pin adopts a square design, which conforms to the principle of professional engineering. It is practical and compact and can be stored in a tool bag or a small container. The square retaining clip can provide a quick lock, which is suitable for most quick lock pins. WIDE RANGE OF APPLICATIONS: The package contains 10 trailer safety pins, ideal for replacing missing hitches. Ideal for table saws, lawns, gardening, agriculture, trucks, boats, trailers or other lock-down applications. lucky meet