An External Retaining Ring, also known as an External Snap Ring is used to secure a part onto a shaft. The ring is circular with a gap that allows it to be placed onto a shaft without having to slide it over the end of the mounting shaft.Attributes:• Prevents the part from becoming dislodged during operation• Helps to dampen the vibration caused by the movementsApplications:An External Retaining Ring allows placing on the outside of the shaft or bore.