Check out our Bundle of Blueprint Rack with Two Cartons of 30 inch Drawing Clamps. Aluminum drawing clamps are made to hold drawings and documents up to 30 inches wide. Each clamp will hold up to 100 pounds of drawings and the stand holds a dozen clamps which are easily removed or held in place. The hangers pivot from left to right and allow you to view your drawings or projects of drawing sets for easily identification and organization.