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There are various types of staples for paper, including heavy-duty staples, designed for use on documents 20, 50, or over 100 pages thick.There are also speedpoint staples, which have slightly sharper teeth so they can go through paper more easily.The staple breaks from the end of the strip and the legs of the staple are forced through the paper.As the legs hit the grooves in the anvil they are bent to hold the pages together.The large staples found on corrugated cardboard boxes have folded legs, but they are applied from the outside and do not use an anvil; jaw-like appendages push through the cardboard alongside the legs and bend them from the outside.Saddle stitch staplers, also known as "booklet staplers," feature a longer reach from the pivot point than general-purpose staplers and are used to bind pages into a booklet or "signature".Some companies have unique staples just for their products.

Powered electric staplers or pneumatic staplers drive staples easily and accurately; they are the simplest manner of applying staples, but are hindered by a cord or hose.Staple strips are commonly available as "full strips" with 210 staples per strip.Some staple sizes are used more commonly than others, depending on the application required.24/6 staples are described by the German DIN 7405 standard.In the United States, the specifications for non-medical industrial staples are described in ASTM F1667-15, Standard Specification for Driven Fasteners: Nails, Spikes, and Staples.Staple guns do not have backing anvils and are exclusively used for tacking.


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