Swivel

A swivel is a connection that allows the connected object, such as a gun, chair, swivel caster, or an anchor rode to rotate horizontally or vertically.

A common design for a swivel is a cylindrical rod that can turn freely within a support structure.

Another common design is a sphere that is able to rotate within a support structure.

Swivels are also used in the nautical sector as an element of the anchor rode and in a boat mooring systems.

[4] The anchor swivel is expected to fulfill two purposes: The biggest concern about anchor swivels is that they might introduce a weak link to the rode.