Comb Clip Strip Apron Punching Machine 21 Hole Tender Book Binding Machine 10 Hole Clip Strip A4 Binding Machine ,Easy to Use

Hole margin: 3/4/5mm Hole shape: 3*8mm Number of punched holes: 21 holes Number of punched sheets: 12 sheets of 80 grams Binding capacity MAX: 450 pages (A4-70g)