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  2. Leather punch - Wikipedia

    en.wikipedia.org/wiki/Leather_punch

    The punch may be a simple metal tool struck with a hammer; or several such punches may be mounted on a rotary turret on a pliers-like tool with an anvil, with the desired size selected by rotating the turret. Hole diameters typically range from about 1mm to 6mm. They are typically used for making holes for buckles, eyelets, and rivets in shoes ...

  3. Hole punch - Wikipedia

    en.wikipedia.org/wiki/Hole_punch

    The origins of the hole punch date back to Germany; Friedrich Soennecken filed his patent on 14 November 1886, for his Papierlocher für Sammelmappen, a multiple-hole punch and office supply product. [1] [2] A Google Doodle was used on 14 November 2017 to celebrate the 131st anniversary of the hole punch. [3]

  4. Punch (tool) - Wikipedia

    en.wikipedia.org/wiki/Punch_(tool)

    A punch is a tool used to indent or create a hole through a hard surface. They usually consist of a hard metal rod with a narrow tip at one end and a broad flat "butt" at the other. When used, the narrower end is pointed against a target surface and the broad end is struck with a hammer or mallet , causing the blunt force of the blow to be ...

  5. Grommet - Wikipedia

    en.wikipedia.org/wiki/Grommet

    A grommet is a ring or edge strip inserted into a hole through thin material, typically a sheet of textile fabric, sheet metal or composite of carbon fiber, wood or honeycomb. Grommets are generally flared or collared on each side to keep them in place, and are often made of metal, plastic, or rubber. They may be used to prevent tearing or ...

  6. Punching - Wikipedia

    en.wikipedia.org/wiki/Punching

    Die and punch shapes affect the force during the punching process. The punch force increases during the process as the entire thickness of the material is sheared at once. A beveled punch helps in the shearing of thicker materials by reducing the force at the beginning of the stroke. However, beveling a punch will distort the shape because of ...

  7. Hole punching - Wikipedia

    en.wikipedia.org/wiki/Hole_punching

    Hole punching may refer to: Hole punch, an office tool used to create holes in sheets of paper; Punch (tool), a hard metal rod with a narrow tip which can be used for forming holes; Hole punching (networking), a technique in computer networking to establish a connection between two parties behind firewalls

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