Martin Yale MP250 Master 2-Hole Paper Punch, Black, 9/32" Hole Diameter, Punches Up To 40 Sheets, Adjustable Paper Guide, Lock-down Handle Punches through up to 40 sheets of 20 lb bond paper Padded oversized handle helps cushion hands when punching stacks Oversized 9/32 Inches punch heads for easier page turning Adjustable paper guide ensures exact centering Lock down handle for storage and safety