A high quality precision device designed to tightly stretch watercolor paper. As the screws on the edge of the board are tightened, tension is placed on the outside edges of the paper. After the paper has dried, the paper will stay flat and buckle-free during wet washes. Holds 140 lb. to 300 lb. paper. Universal tripod mount on base allows you to attach this set to a tripod. Comfortable handle. Extruded aluminum and hard board.