Fellowes Quasar-E 500 Comb Binder is a powerful binder that is ideal for use in the Mid-sized to Large Office. Features electric punching for ultimate ease of use. Punches up to 20 sheets at a time (80gsm). Binds documents up to 500 sheets - max comb width 50mm. Includes a storage tray with patented comb document measure to allow users to select quickly. Vertical sheet loading ensures consistent punch alignment. Adjustable edge guide aligns sheets accurately. Includes binding starter kit for 10 documents. Comes with a 2 year warranty.