comb binding

US /koʊm ˈbaɪn.dɪŋ/
UK /koʊm ˈbaɪn.dɪŋ/
"comb binding" picture
1.

a method of binding documents using a plastic comb that is inserted into rectangular holes punched along one edge of the pages

:
The report was finished with a professional comb binding.
We need to buy more plastic combs for the comb binding machine.