question: Why do some staplers have two settings?
comment: The setting that bends the staples outwards instead of inwards makes it easier to remove the staples afterwards, if you expect to need to do that. If you mean for it to be permanent, the “regular” inward setting makes for a stronger connection.
passages: Section::::Background.
   Unlike office staplers, some staple guns lack an anvil, the metal plate with curved slots that office staplers use to bend the legs of the staple inwards or outwards and flatten them against the paper.
   Most staplers are used to join multiple sheets of paper. Paper staplers come in two distinct types: manual and electric. Manual staplers are normally hand-held, although models that are used while set on a desk or other surface are not uncommon. Electric staplers exist in a variety of different designs and models. Their primary operating function is to join large numbers of paper sheets together in rapid succession. Some electric staplers can join up to 20 sheets at a time. Typical staplers are a third-class lever.
   In 1941 the type of paper stapler that is the most common in use today was developed: the four way paper stapler. With the four way, the operator could either use the stapler to staple papers to wood or cardboard, or used to staple like pliers for bags, or the normal way with the head positioned a small distance above the stapling plate. The stapling plate is known as the anvil. The anvil often has two settings: the first, and by far most common, is the reflexive setting, also known as the "primary" or "permanent" setting. In this position the legs of the staple are folded toward the center of the cross bar. It is used to staple papers which are not expected to need separation. If rotated 180° or slid to its second position, the anvil will be set on the sheer setting, also known as "secondary", "temporary", or "straight". In this position the legs of the staple are folded outwards, away from the cross bar, resulting in the legs and cross bar being in more or less a straight line. Stapling with this setting will result in more-weakly secured papers, but a staple that is much easier to remove. The use of the second setting is almost never seen, however, due to the prevalence of staple removers and the general lack of knowledge about its use. Some simple modern staplers feature a fixed anvil that lacks the sheer position.
   The pin carrying contacts 3 and 4 is generally completely absent from these adaptors, as are the contacts 1 and 5. Equipment such as handsets, modems and extension bells sold in or for use in Australia often arrives packaged with one of these adaptors.
  
  Section::::Modular adaptors.:6P4C.
  
  This is common in extension cables, many of which have built-in adaptors to 6P4C (and more rarely to 6P6C). There are several conflicting schemes, some using pair two in addition to one, others one and three. As most applications use only pair one, most users are unaware of the potential problem.
   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, such as the Ring King, can also use "loop-staples" that enable the user to integrate folded matter into ring books and binders.
   BULLET::::2. Press the blade up and away from yourself to remove the staple from the papers
  
  Section::::Design.
   Section::::Components.:Plastic grips.
   Proper use of the opposing wedge staple remover is debated; the two major methods are described below.
  
  Section::::Use.:Original ("fast") method.
  
  The user forcefully clips the front flat side of the staple, causing the folded tabs on the reverse side to open and pull through the entry holes. This method requires much less time. Although this method is quick, it can have the undesirable side effect of tearing the paper when the folded tabs pull through. Tearing usually does not occur when higher quality paper is used or the staple connects three or more sheets.
   Modern staplers continue to evolve and adapt to the changing habits of users. Less-effort, or easy-squeeze/use staplers, for example, make use of different leverage efficiencies to reduce the amount of force the user need apply. As a result, these staplers tend to be used in work environments where repetitive, large stapling jobs are routine.
   A further complication is that, due to its extra height, any accessory fitted to the orbital hub of the Major must be longer than its Chef counterpart, so Major and Chef attachments for this hub are incompatible. This includes beaters, which need to reach to the bottom of the bowl, potato peeler, ice cream maker and others.
  
  Section::::Attachments.
  
  Many attachments (e.g. coffee grinder, slicer and shredder, cream maker, grain mill, liquidiser, tin opener, potato peeler etc.) are available. 
   Permanent fastening binds items by driving the staple through the material and into an "anvil", a small metal plate that bends the ends, usually inward. On most modern staplers, the anvil rotates or slides to change between bending the staple ends inward for permanent stapling or outward for "pinning" (see below). Clinches can be standard, squiggled, flat, or rounded completely adjacent to the paper to facilitate neater document stacking.
   Some modern desktop staplers make use of Flat Clinch technology. With Flat Clinch staplers, the staple legs first pierce the paper and are then bent over and pressed absolutely flat against the paper – doing away with the two-setting anvil commonly used and making use of a recessed stapling base in which the legs are folded. Accordingly, staples do not have sharper edges exposed and lead to flatter stacking of paper – saving on filing and binder space.
  
  Section::::Industry.
  
  In 2012, $80 million worth of staplers were sold in the US. The dominant US manufacturer is Swingline.
  
  Section::::Methods.
   Within a trigger group, any number of sears may exist. For example, a Ruger Blackhawk single-action revolver contains one for releasing the hammer. A Ruger Redhawk double/single-action revolver contains two, one for single-action release and the other for double-action release. A Browning BLR rifle contains three sears, all used simultaneously for hammer release. On many select-fire rifles two sears exist, one for semi-automatic fire and the second for full-automatic fire. In this case, the selector switch disengages one over the other.
   Section::::Components.
  
  Section::::Components.:Blades.
   There are few standards for staple size, length and thickness. This has led to many different incompatible staples and staplers systems, all serving the same purpose or applications.
  
  24/6 staples are described by the German DIN 7405 standard.
   BULLET::::- A velcro strap on a shoe passes through a slot and folds over on itself. The slot is a movable pulley and the MA = 2.
   Section::::Types of ATC.
  
  Depending on the shape of the magazine, ATC can be of two types: Drum Type changers are used when the number of tools is lower than 30. The tools are stored on the periphery of the drum. Chain type changers are used when the number of tools is higher than 30(The number is different depending on the design and manufacturer. It is important to note that the number of tools for the drum type is fewer than the chain type). But the tool search speed will be lower in this case.
  
  Section::::Automatic Tool Changer Mechanism.
   Rounds of the same caliber but with different-shaped meplats sometimes cannot be loaded into the same firearm. The meplat plays an important role in the loading of weapons whose ammunition is guided into the chamber by a mechanism (e.g., auto-loading, lever action or bolt action), though this usually is not important in weapons whose rounds are chambered by hand (e.g., single shots, double rifles, drillings and revolvers) rather than by a mechanism.
  
  Meplats are often used to increase the bullet's wounding ability. 
   Section::::Components.:Torsion springs.
   Modern staples for paper staplers are made from zinc-plated steel wires glued together and bent to form a long strip of staples. Staple strips are commonly available as "full strips" with 210 staples per strip. Both copper plated and more expensive stainless steel staples which do not rust are also available, but uncommon.
  
  Some staple sizes are used more commonly than others, depending on the application required. Some companies have unique staples just for their products. Staples from one manufacturer may or may not fit another manufacturers unit even if they look similar and serve the same purpose.
   BULLET::::3. Turn the paper back over to the front side against which the main body of the staple has been pressed.
  
  BULLET::::4. Gently slide the tines on one side of the remover under the main body of the staple and press the remover's halves together until you have a firm hold on the staple.
  
  BULLET::::5. Continuing to maintain a firm hold on the staple, pull the entire staple gently out of the paper.
  
  Proper for pen style remover:
  
  BULLET::::1. The metal tip should be placed just beneath the front side of the staple
   In 1964, a 2nd Pattern of the Small Arms Ammunition Case were introduced that was missing the plastic stiffener in front. This allowed the case to carry three M14 magazines side-by-side rather than two.
   Most staple guns, especially the hand-powered models, have a spring-like mechanism for storing mechanical energy and delivering it as a sharp and powerful blow. This mechanism is necessary because of the large force needed to drive the staples through solid wood or masonry, and because the staple must be completely inserted before the workpiece has time to move . In the office stapler, by contrast, the staple can be driven directly by the user's muscle power, at a relatively slow speed, because the paper is firmly supported by the anvil. In other words, the staple gun substitutes the workpiece's inertia for the missing anvil.
   Section::::Test setup.
  