GBC makes a special brand of Velobind strips called Surebind. They have 10-pins and hold anywhere from 250 to 750 sheets of 20lb sheets of paper. They are 11" in length so they'll fit your standard letter size paper. They provide the best security, since they don't reclose once opened. They use a special Surebind hot knife system to seal them up. GBC made black, white, and navy blue strips, to match any professional setting. Use these for manuals, project reports, and more. Clients will be impressed with its clean, minimal look and feel.