Swingline GBC CombBind C800pro Binding System, 500 Sheet, 18 1/2 x 19 5/16 x 14 7/8, GrayHigh volume, electric binding system features adjustable pins to punch any size up to 12" wide or 21 holes for odd-sized documents. Adjustable punch margin guide. Also includes a foot pedal for fast, hands-free electric punch operation. Binding comb size guide. Binding Spine Type: Comb; Binding Sheet Capacity: 500; Punching Sheet Capacity: 25; Maximum Binding Edge: 12".