AdirOffice 30" Blueprint File Hanging Clamps - Grey (Set of 6) CONVENIENT SIZE. This 30 file hanging clamp is conveniently sold as a 6-pack set so you can safely store and hold a number of documents. The clamp jaws open to 1" wide, easily and effectively clipping all of your large files together. STRONG, STURDY CONSTRUCTION. Durably constructed using sturdy aluminum with solid steel, silver wing knobs, these hanging clamps are both visually pleasing and soundly strong to provide long-lasting strength and use for years to come. EASY TO ORGANIZE. Transparent, snap-on plastic label holders are included in the package for easy identification and retrieval, making it simple to find what youre looking for when going through your huge assortment. ACCOMMODATES LARGE FILES. Perfect for blueprints, maps, layouts, plan drawings and other large-format documents, each clamp can accommodate up to 100 sheets or 20 pounds at the same time! And since each pack includes six clamps, you'll be able to hold up to 600 sheets or 120 pounds at once! STYLISH AND PROFESSIONAL LOOK. These hanging clamps are attractive and professional looking, ideal if you plan on using them to hold documents for a presentation you're going to make. They can also be used with all racks, including Adir, Mayline, Alvin, Safco, Brookside Design and Sandusky.