Such a knife generally consists of a simple and cheap holder, typically flat, approximately one inch (25 mm) wide and three to four inches (75 to 100 mm) long, and typically made of either metal or plastic. Some use standard razor blades, others specialised double-ended blades as in the illustration. The user can manually adjust how far the blade extends from the handle, so that for example the knife can be used to cut the tape sealing a package without damaging the contents of the package. When the blade becomes dull, it can be quickly reversed or switched for a new one. Spare blades are often stored in the hollow knife handle, and can be accessed by removing a screw and opening the handle.

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This type of tool is known in British English, Australian English and New Zealand English as a Stanley knife, after one of the first manufacturers to create this kind of implement. The genuine Stanley knife has a cast-metal body, and comes both in retractable versions and in fixed blade versions which allow no depth adjustment. There have been a number of versions of the classic retractable Stanley No. 99. The current model is the 99E [1]. Fixed blade versions are widely used for handcrafts. The blades for a utility knife come in both double and single ended versions, and are interchangeable with many but not all of the later copies. Specialised blades also exist for cutting string, linoleum and other purposes. Spare or used blades may be stored in the handle.

另一种形式：

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Another style is one in which a handle, usually of plastic, contains a long, segmented blade which slides out from it. As the endmost edge becomes dull, it can be snapped off from the rest of the blade, exposing the next section which is sharp and ready for use. When all the individual segments are used, it is thrown away or a replacement blade is inserted. This kind often comes in bright colors like orange, blue and yellow.

A style that is often used for the cutting of boxes consists of a simple sleeve around a rectangular handle into which single-edge razor blades can be inserted. The sleeve slides up and down on the handle, holding the blade in place during use and covering the blade when not in use.

Utility knives as weapons

Though such knives are not usually considered weapons, it was suggested by certain United States government officials that "box-cutter knives" were used in the September 11, 2001, terrorist attacks against that country. However, the exact design of these knives is unclear. (See Airport security repercussions due to the September 11, 2001 attacks for further discussion.)

They have also been used by minor criminals in muggings, and some schools ban their possession on school grounds; a campaign against the sale of box-cutter knives to young people was instigated in New York City by Mayor Rudy Giuliani in the 1990s. It is not uncommon for young people to use these knives for vandalism purposes. The most common method of using a utility knife for vandalism is the breaking and entering of an art gallery, using the box cutters to slash the expensive pieces of art.

On June 1, 2004, Japanese elementary school student Satomi Mitarai was stabbed to death by "Nevada-tan," an unnamed classmate, using a segmented-type utility knife.

In Australia, it is illegal to sell a cutting implement such as a utility knife to anyone under 16 years of age, and proof of age is often demanded of purchasers.

Recently, in the United Kingdom, there have been plans to raise the age limit for purchasing knives, including utility knives, from 16 to 18, in an effort to tackle "yob culture."

In Israel and Switzerland, these knives are known as Japanese knives.

复【原创】啥是Stanley knife？有人知道么？

家园

谢谢了，原来就是美工刀啊。

果然还是要见识了才知道是啥东西，光看名字不知道呢。

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