These 30 Inch File Hanging Clamps hold blueprints, construction plans, drawings, and documents securely in place. Perfect for hanging file systems, these quality aluminum clamps feature solid steel wing knobs for extra strong and balanced gripping tension. And they come with clear plastic label holders to help you identify your items quickly and easily. Additional Information * Clear plastic label holders included for easy identification * Fits sheet size of 30 x 42 inches * Attractive and professional * Fits all Adir, Mayline, and Safco racks * Solid steel silver wing knobs provide balanced gripping tension * Limited lifetime warranty About Adir Corporation Adir Corporation is a leading manufacturer and supplier of practical, affordable, and durable filing supplies and storage solutions. The company is committed to meeting the evolving needs of customers with quality products designed for professionals in the fields of engineering, drafting, construction, architecture, and graphic arts. Adir"s ever-expanding range of user-friendly, innovative products include mobile files, accessories, and storage systems for blueprints, plans, drawings, maps, and other oversized documents. * Strong, sturdy aluminum clamps * Secures blueprints and documents for easy storage * Clamps hold up to 100 sheets or 20 lbs. * Sold in cartons of 6 * Dimensions: 31.25W x .75D x 2.5H inches