Modular switch shaft extenders allow switches to be mated with a setup that may not suit them as they are delivered. The extenders can be used for all different types of switches, allowing them to be raised above the surface of a board that they would sit underneath without the extender.
Shaft extenders also allow switches to be raised above the board enough to make them stand out compared to other switches. This is a solution that is frequently employed for switches that need to be very easily accessible, such as emergency shutoff buttons and so forth.
These extenders have to be selected so that they fit the switches to which they are attached and so that they provide the right elevation above the board. They are usually sold in quantities, making it easy to get enough to finish any installation job.