Novus B54 Heavy Duty Stapler, 20-170 Sheet Capacity, Anti-Jam, 9-7/8&rdquo; Staple Depth wGuide, German Engineered, 25 Year Warranty (023-0038) Anti Blocking System prevents staple jams Throat Depth: 9-7/8" Throat Depth for greater reach across documents and binding booklets, 20-170 Sheet Capacity Bypass system prevents overlap of staple legs when stapling smaller quantities Rotating anvil for bypass or parallel stapling Dimensions: 17 3/4" x 4" x 11"