Rotor Clip manufactures a full line of retaining rings including: self-locking O-rings, metric retaining rings, and kits. They also supply retaining ring assembly tools and plier kits. The dynamics of a Rotor Clip Retaining Ring is simple: It's made from less material than traditional eliminating machined shoulders, threads, cover plates, heat formed studs, so you save. It is a quality part offering lot trace ability so you use your Rotor Clip Retaining Rings with confidence while you save.