Secure fit for Garmin Catalyst™ racing performance optimizer or Overlander® off-road navigation. Quick and easy with one-handed attachment and removal. The package includes a 2.5" round base with an AMPS hole pattern, a quick-release lever with a ball joint socket on both ends, and an adapter that can be attached to the back of the holder. The product features a low-profile magnetic mount that replaces the magnetic mount included with the Overlander and Catalyst devices. Magnetic mounts included in the factory packaging of Overlander and Catalyst devices cannot be used with this mount. Ball joint size 1” (25.4 mm).