Internal snap rings are circular fasteners used to secure components within a housing or bore. They fit into a groove on the inside of a shaft or housing, preventing parts from moving out of place. These rings are commonly made from spring steel, which allows them to maintain their shape and provide a strong grip. Installation of internal snap rings is straightforward, often requiring a pair of pliers designed for this purpose. They come in various sizes and thicknesses to accommodate different applications, making them versatile for use in machinery, automotive parts, and other mechanical assemblies.