The Bindfast Perfect Binder adds that clean, professional, finishing touch to your paper back book. Not only are the hot melt glue binds strong (capable of withstanding up to 50 pounds of pull) but the covers can be printed in 1, 2 or full color layouts depending on your budget. This machine ensures that your volumes, ranging from 25 to 350 pages, are held accurately, firmly, and permanently giving your documents the crisp presentation they deserve.