AdirPro Prism Pole Bipod (Red) Equivalent to Sokkia 724897 and Seco 5217-04 Open thumb screw head, Aluminum frame Fits 1 to 1.25-inch diameter poles from the side or 1.5-inch poles through the top Legs extend up to 6 feet and collapses to 3.5 feet Choice of colors, Quick and easy set up