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Retaining rings are fasteners designed to prevent mating parts from excessive movements during operation. These retaining rings are thin circular metal components fitted in external or internal machine grooves to secure parts in position and to reduce vibration. Circlips, also known as C-clips, rotor clips, and snap rings, are common types of retaining rings with open ends that are snapped into place, while E-clips or E-rings have wider open ends and resembles the letter ‘E’ that is elastically deformed to install or remove them. Most retaining rings typically have holes in their open ends where circlip pliers grab into for proper installation or removal. Retaining clips are available in different sizes for various industrial machinery and automotive applications.