Arkon"s Universal Boat Helm Mount for Tablets features an innovative holder that adjusts to fit any 7" - 12" tablet and a 4" arm. The mount base fits rails and posts up to 33mm diameter. Innovative, adjustable holder fits any tablet 7"-12" with or without a case or skin.Can be mounted on posts and rails up to 33mm in diameter.For use with bicycles, motorcycles, golf carts, boats, ATVs, snowmobiles, wheelchairs, hang gliders, or other apparatus having cylinder-shaped frames or posts.360° rotation for positioning in portrait or landscape view.