??★ punch easy effort， fashionable and stylish， simple and elegant binding
★ punch Quantity: 21 holes; adjustable margins: 3，4，5mm; hole pitch: 14.3mm
★ pore size: 3 * 8mm; including packaging weight: 3.2kg; steel type: V1288 whole knife
★ maximum binding thickness: 450 / 51mm; maximum drilling capacity: 12 (A4，80G)