This Heavy duty stapler is well designed to serve the purpose of meeting with all your bulk stapling needs with the following features: All metal construction, Adjustable paper guide that can be used for jam clearing, Rubber base to avoid desk top from scratches, Rear loading, Rotating anvil for different staple sizes, staple use : 6-15mm and 16-23mm with loading Capacity: 100 Staples and stapling Capacity: up to140 Sheets. This Heavy duty stapler is well designed to serve the purpose of meeting with all your bulk stapling needs with the following features: All metal construction, Adjustable paper guide that can be used for jam clearing, Rubber base to avoid desk top from scratches, Rear loading, Rotating anvil for different staple sizes, staple use : 6-15mm and 16-23mm with loading Capacity: 100 Staples and stapling Capacity: up to140 Sheets.