Circlips.

Circlips are a type of mechanical fastener used to secure another component on a shaft or in a hole. They have a range of different functions depending on the application and are often used in the mechanical and automotive industries.

One of the most important functions of circlips is that they prevent a component from sliding off a shaft or out of a hole. This is especially important in high-speed machines where components can rotate quickly and under high pressure. circlips also reduce vibrations and noise that can arise from moving parts.