The RAP-B-121-GA31U consists of a universal glare shield clamp base, double socket arm, diamond adapter base and high strength composite cradle. The mounting base can also accept a second ball (RAP-B-121BBU) giving you the ultimate double ball base. The clamp base will accommodate round rails or flat edge lips from 0.625" to a maximum of 1.25" in diameter. Modular in design, switch out the clamps for a perfect fit no matter what the mounting surface. Crafted to hold firm to most glare shields, yokes, or tubing, practically any aircraft or vehicle can benefit from this product. The mount is designed with a RAM 1" diameter patented rubber ball and socket system that has adjustment points at both ends of the double socket arm; this allowing for almost infinite adjustment and perfect viewing angles.