Features:

• Extended capacity: staples up to 160 sheets of 20 lb. paper.
• Durable all-metal working components.
• Full 2~5/8" throat depth for flexibility and control.
• Adjustment guide for precise alignment.
• Easy front-end jam-clearing mechanism.

Editor Reviews:

Product Description:
Durable all-metal mechanism ensures lasting performance. Extended capacity: staples up to 160 sheets of 20 lb. paper. Durable all-metal working components. Full 2-3/4" throat depth for flexibility and control. Soft-touch materials for stapling comfort. Adjustment guide for precise alignment. Easy front-end jam-clearing mechanism. Uses Swingline series #353XX or #793XX heavy duty staples: 1/4", 3/8", 1/2", 3/4". Limited lifetime warranty.

Amazon.com Product Description:
Providing work-horse reliability for heavy-duty stapling applications, the Swingline S7039005R Heavy Duty Stapler includes durable, all-metal construction for years of superior performance. A paper adjustment guide is also included, a feature that ensures jobs of up to 160 sheets of 20-pound paper are stapled with precision. Other useful features include a 2-5/8-inch throat depth for flexibility and control, and soft-touch materials for added comfort. Compatible with Swingline heavy-duty staples in 1/4-, 3/8-, 1/2-, and 3/4-inch lengths, the stapler comes with a front-end jam-clearing mechanism for added precision. The stapler is backed by a manufacturer's limited lifetime warranty.

Rating : - Decent but temperamental...
I work in a college computer lab and we have one of these for student usage and there are several things I have learned over the years about this stapler:

1) It jams really easy when not used properly. (pressing down all the way and recommended sheet count; 30-160 sheets no more no less)

2) Once jammed it needs to be fixed before the stapler get used again or it will get worse.

3) Once it gets worse there is no unlocking the front access to unjam it, so you'll have no choice but to rip it apart.

Fixing this can become a daily chore as the stapler becomes older, the one I deal with is around 7 years old. Things to watch out for: The screws that attach the base to the stapler body are not secured on with a nut and tend to strip and not hold after a while, secure these with a nut, it should be a 10-32 screw, this will prevent future head aches; this jams and it jams badly, check the stapler regularly for jams, always remove the rear staple plunger before opening the forward latch, unless you just like watching a staple bar shoot across the room; and if repairs must be done do it some where with a large flat table, this stapler is held together primarily by 5 pins, 2 screws, and 4 pin clips, and the pin clips tend to go flying when they are removed. The the stapler is made up of 5 primary parts, the base, the mounting bracket, the body (which is made up of multiple affixed parts), the staple pressure arm (plunger), front access door, and handle.

Over all this is a decent stapler but to avoid having to deal with the above you can either keep an eye on the stapler or make like Milton in office space and try not to let anybody else touch it.