SAD-B45e Electrical Binding Machine for Plastic Comb And Metal Wire 500 sheet Binding for up to 500 sheets for 2 plastic comb and 120 sheets 9/16 3:1 wire; Electrical hole punching capacity, with remote control, 19-holes for comb, 32-holes for wire, for up to 25 sheets letter size paper format; Build in plastic comb and wire guide; Adjustable paper guide for vertical paper loading; and Build in waste bin for punching chips with acoustic alarm when full.