High-capacity Heavy-duty Stapler offers maximum capacity and exceptional durability. Staples up to 210 sheets of 20 lb. paper. All metal die-cast construction delivers years of superior performance. Offers perfect alignments with precision adjustment guide. 2-1/2" throat depth for enhanced control and flexibility. Soft feel materials on handle for added comfort. Easy front-end jam-clearing mechanism. Uses Swingline series 353XX heavy-duty staples: 1/4" , 3/8" , 1/2" , 5/8" , 3/4" and 15/16".