Mount Kit - X-Grip® - U-BoltCaracteristicas: High strength composite and stainless steel construction and powder coated marine grade aluminum Include a 1" diameter patented rubber ball and socket system with adjustment points at both ends of the socket arm; this, with a twist of the arm knob, allows you to move the X Grip mount to optimum viewing position Spring loaded holder expands and contracts for perfect fit of device Rubber coated tips will hold device firm and stable The