Twin loop coil binding machine Twin Loop Coil Binding Machines use wire coils or spirals to bind pages. They punch holes into the paper before laying them over the wire, then close the coil using a pull handle. They can bind with small wires using a 32-hole punch, or large wires with a 21-hole punch. The bound document lies flat and can fold back 360 degrees. Twin Loop Coil Binding Machines are commonly used for low- to medium-volume binding jobs. Plastic comb binding machines Plastic comb binding machines use curved plastic combs to hold the pages together. The comb is loaded into the machine and spread open with a handle, and the pages are punched and inserted into the comb. The comb is then closed using the same handle. They also create flat documents and allow the pages to fold back. The comb can be reopened to edit, insert and remove pages. This makes them ideal for collaborative projects. They are available as one-piece machines or as a separate punch and comb opener. Plastic coil binders Plastic coil binders use coils made of thick, rigid plastic. The coil is inserted at one end of the document, snipped, and spun through the holes using a roller. The documents can also lie flat and fold back. | 
