Durable all metal construction stapler makes booklet stapling easy! Mounted with the classic Bostitch B440 stapler. The AntiJam mechanism eliminates frustrating staple jams. This long reach stapler has a one foot (12-Inch) throat depth, which can staple even the largest booklets. It also has an Adjustable paper stop with both standard and metric measurements, to enusre precision alignments and consistency. The no skid rubber feet help keep the stapler in place while you"re completing jobs. Staple supply indicator shows if you"re getting low on staples. Can staple up to 20 sheets of 20lb paper. Manufacturer"s 7-year warranty.