1,WIDELY USED: 10 hole loose leaf puncher is suitable for binding A4, B5, A5, A7, B4 paper, 20, 26, 30 holes or more porous number of loose leaf, ledger, etc. 2,10 SHEETS CAPACITY: The paper binding machine can penetrate up to 10 sheets(70g) of paper with a diameter of 5.5mm and hole spacing of 9.5mm 3,CUSTOM PUNCHING: The scale line attached to the ruler board can accurately locate the edge position of A4, A5, B5 paper. A4 30 holes, A5 20 holes and B5 26 holes can be drilled according to demand. After mastering the use of the method, you can customize the number of holes, DIY punching 4,ACCURATE HOLE PUNCHING: Both sides of the punch have positioning posts and rulers, which can easily determine the position of the punch 5,DURABLE AND NON SLIP: Paper spiral binder machine has an all metal lacquered body for rugged durability. The clamshell plastic tray collects paper scraps, non slip and protect the table top Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.