Wheelchair Rail - Tube Mount with Extension & Tablet Holder for Amazon Fire HD 10.1" (sku 33051)This Mount features a U Bolt with 1. 5" Rubber Ball, a Standard Double Socket Arm 1. 5", a Double 1. 5" Ball Adapter, a Double Socket Swivel Arm with hinge for 1. 5" Ball to 1" Ball together with a heavy duty tablet holder Ideal for use when a leather or armor style case is used. The spring loaded tablet holder design makes it easy to load and unload a tablet in a heavy duty case along with keeping it secure while on the go Cup ends are designed to