The Fellowes PB250E Comb Binding Machine is designed for medium-duty users who bind documents on a weekly basis. Ideal for moderate home or home office use. Effortless electric operation. Punches 19 rectangular holes for letter-size paper. Punches 15 sheets at a time and binds up to 240 sheets on a 1 1/8" comb. Margin depth adjusts to ensure paper hole placement for thick documents. Efficient design allows user to punch and bind in continuous manner . See-thru window shows when waste drawer is full.