This kit includes a B size RAM diamond ball base with a universal hardware pack that accommodates the seat track on most major wheelchair brands, including Invacare, Permobil, and Quickie. With the included short single socket arm, 9" pipe extension, and medium double socket arm, connect and adjust the RAM X-Grip universal phone holder to your ideal position. The popular, spring-loaded RAM X-Grip provides a perfect fit for a wide variety of phones.