A Circlip, also known as a retaining ring or snap ring, is a type of fastener used to secure components onto a shaft or in a bore. It is a circular or semi-circular metal ring with open ends that can be expanded or contracted to fit into a groove or recess. Attributes:• Have a ring shape with a gap or opening at one point. • The ends of the circlip are expanded or contracted to fit into a groove or recess in the shaft or bore. • Installed using special pliers or tools designed for circlip installation and removal. Applications: A Circlip is used to secure the pin in the quick coupler hook.