It has A4 size base, the base is made of metal.Cover is also made of metal, very strong and tough.
It is suitable for using at school, office and home, it is easy to make a note book quickly.
Machine can punch about 25 sheets of 70-80g A4 size paper
and bind about 500 sheets of 70g A4 size paper with 51 mm comb ring.
But we suggest you punch below 20 sheets per time, it will be more easy to punch and machine will have a long life use.
With all selectable pins, machines can punch smaller than A4 size paper,like LTR,B5,A5,A6,etc.
