Chemically-blackened steel clips, also known as external retaining clips. For use on various rotating shafts and hinge pins. Includes assorted sizes 1.5 – 22m. Handy storage case with compartments. Chemically-blackened steel clips, also known as external retaining clips. For use on various rotating shafts and hinge pins. Includes assorted sizes 1.5 – 22m. Handy storage case with compartments.