Ability to change the number, adjustment, and size of blades (6 or 8 mm). Sold with 4 blades with a diameter of 6mm. A system that facilitates adjustment and replacement of blades. Punches up to 30 sheets of paper. Capable for metal. Equipped with a precision stop, also for A4 and A3 formats. Rotary adjuster with two scales for 13 formats, centimeter and...