Types
Staple guns may be driven by muscle power, electricity (from domestic power or from batteries) or compressed air. Power staple guns can set staples at a somewhat quicker rate than hand-powered models, but their main advantage is that they can be used continuously for hours with comparatively little fatigue.
Some staple guns have a long nose that allows the staples to be applied into recessed corners. Another special feature may be wire guides for wiring to ensure that the staples will not pierce the wire. The "forward action" staple gun has a handle that points toward the trigger end, in the opposite direction of the traditional staple gun. These tools are easier to squeeze and better place pressure at the front of the tool where the staple is ejected. The first so called "forward action" staple gun was introduced about 1934.
A hammer tacker is a device somewhat similar to a staple gun, except that the mechanical energy from the user's muscles is stored—as with a hammer—as momentum of the gun itself, rather than as compression of an internal spring. This type of stapler is typically used for insulation, roofing and carpeting.
For most purposes square end staples are used; but some staplers can take rounded end staples for holding cables against a surface.
Typical staple leg lengths are 1⁄4″, 5⁄16″, 3⁄8″, 1⁄2″, 17⁄32″, and 9⁄16″, or 6, 8, 10, 12, and 14 millimetres.
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