Wheelchair Rail and Tube Mount with Extension and Tablet Holder for Samsung Galaxy Note 8.0 (sku 21667)Wheelchair Rail and Tube Mount with Extension and Tablet Holder for Samsung Galaxy Note 8. 0 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 Universal sprung loaded Tablet Holder. With four points of rubberized 360 degree rotation and a connecting central pivot hinge joint that rotates forward and back