Martin Yale DP20 Master Paper Punch, Heavy-Duty Two-and Three-Hole Punch, Punches Up To 20 Sheets of 20 Pound Bond Paper, Includes High-capacity Chip Pan No screwdrivers needed, no adjustments required One side is a dedicated 3-hole punch The other side is a dedicated 2-hole punch Lever handle slices through up to 20 sheets of 20 lb paper with ease Punches standard 3-hole and 2-hole (2 3/4 Inches centers) patterns