100pcs Cotter Pins Spring Connectors Galvanized R type split pin hairpin spring pin wave Features Material: Steel Finish: Zinc Style: Hitch Pin Color:Silver How to use: 1:You should insert the straight end of the pin through the hole in the bolt or shaft. 2:position the curved section of the R-clip around the outside of the shaft to secure it firmly in place. 3:Ensure the R-clip is properly seated to prevent it from loosening due to vibrations or movement.