The Cotter Pin (or Split Pin) is a 2x22mm silver metal part, sold individually. It is rated as "Easy" to install, and installation will require a set of pliers. It can be attached in various locations on a variety of equipment and is used to secure and lock parts in place. If broken, damaged, or worn down the part it is securing may becom...Read moree loose, and the part should be replaced. If this part is removed for repairs, replace it with a new one. Refer to your make, model, and diagrams to make sure this is the correct part.