From Manufacturer
The 24" Westcott Switch Beauty Dish is a durable light modifier suitable for use with off-camera flashes. The collapsible design allows for rapid assembly and breakdown, making the beauty dish easy to transport. The silver interior maximizes your fixture's output without contaminating the color. The included deflector plate helps redirect light for a softer output, eliminating the hot spot. The included diffusion panel is color neutral.
The term "Switch" in the name refers to the quick release locking mechanism that makes for quick, easy, yet secure changes to the mounting insert, allowing this one beauty dish to be used with a variety of light fixtures. It requires a mounting insert (not included) compatible with the light fixture you are using. In addition to the included neutral color diffusion panel, an optional 40° eggcrate grid can be attached to help control the directionality of the light.