【Safe & Durable】: Made of 304 stainless steel with smooth surface, cotter hitch pin are not easily broken, which are rust-proof and corrosion-resistant, featuring high hardness, strong elasticity and durability. R-type clip-on retaining pin has a diameter of 4mm (0.04") and a total length of 90mm (3.5").

【Wide Application】: These versatile R clip hardware pins is suitable for trailers, tractors, engines, trucks, cars, campers, carts, RVs, lawn mowers, power equipment and other farm equipment.

【Easy Install】：Installing and removing these cotter pins is straightforward. Insert the pin into the designated hole, and the spring mechanism will automatically secure it. Release the tension to slide it out smoothly when needed.

【Meet Your Needs】：The cotter pins feature a strong elastic hairpin design that distributes force evenly. Once engaged, the pin securely locks the bolt and prevents rotation, preventing accidental displacement.

【Use Tips】：Please make sure what size you need before you place an order so that the cotter pin meets your needs perfectly.