Comb Binding Machine Perfect for Letter Size, A4, A5 or Smaller Sizes Office Documents, Heavy Duty Machine. The CombBind C-12 Comb Binding Machine offers you a high-quality, inexpensive alternative for comb binding your documents into a professionally finished presentation. This tabletop comb binding solution is the easiest and economical option for schools and offices. Staff will find it easy to use due to its ergonomic design and the quality punching system will punch comb holes easily and effortlessly. High quality metal chassis will last and provide dependable service for years to come.