Identify the exact binding method, hole count, hole shape, spacing, and pitch used by the machine or finishing process. Comb, coil, wire, ProClick, VeloBind, and filing systems do not share one universal pattern. A sheet can have the correct dimensions and still fail to fit the spine. Use the equipment label, die description, current supplies, or an approved punched sample from the same machine. Confirm the binding edge and orientation as well, because portrait and wide-format documents place holes on different sides. Thread one sample onto the intended spine before printing a large quantity. The holes should align without stretching, skipped positions, or excess movement along the binding edge.