Wheelchair Rail - Tube Mount with Extension and Universal Phone Holder (sku 30632)Wheelchair Rail Tube Mount with Extension and Universal Phone Holder.. This mount features a tool less small Tough Claw base with 1" rubber ball, two double socket arms, a double ball adapter for extra length and articulation together with a universal phone holder. Both the mount and phone are easily attached and removed within seconds and with four points of rubberized 360 degree articulation you are not limited in the positioning or adjustment of