Martin Yale Master Products 40 Sheet 3-Hole Punch - 1340PBPower handle provides more leverage for easier punching of stacks of paper. Punches through up to?40 sheets of 20 lb. bond paper Adjustable punch heads for convenient 2- or 3-hole punching Accepts 2-7 punch heads for custom paper punching? Punch head diameter 13/32 Margin depth guides adjust for custom punching? Adjustable ruled paper guide Non-skid feet to keep it in place while punching Large capacity paper chip panDimensions: 10.875 x 7.5 x 11.125 inchWeight: 6 lbs.