This is the constraint that decides between wire and comb. Closing the wire is permanent, so a document still being revised belongs in a comb binder instead. Check the closing mechanism covers the diameters you use, since machines are rated for a range rather than all sizes. Punch capacity is a peak figure. See wire binding combs, binding machines and comb binding machines.

Wire binding machine arranged on a professional office desk with bound reports, proposal documents and print room stationery.
Wire Binding Machines for Reports

Shop wire binding machines for reports, manuals, calendars, proposals and professional document binding.

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