Mini Binding Machine 1,Punch System: 21/4 or 21/3 holes 2, ... 3,Max punching:4 sheets 4,ISO9001,BSCI Mini Binding Machine 1, Operation Methord: Manual 2, Punching System: 21 / 4 holes ... : 435*152*75mm9, ISO9001:2000, BSCI & UL certificated company binding machine