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2. Drift pin - Wikipedia

   en.wikipedia.org/wiki/Drift_pin

   This technique is especially useful for aligning fastener holes in structural steel members, which always have multiple holes, such that when one pair of mating holes comes into alignment, the others in the set are aligned, allowing a fastener, usually a bolt, to be inserted, before the drift pin is removed.

3. 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 ...

4. Knockout punch - Wikipedia

   en.wikipedia.org/wiki/Knockout_punch

   In metalworking, a knockout punch, also known as a chassis punch, panel punch, Greenlee punch, or a Q-max, [1] is a hand tool used to punch a hole through sheet metal. It is a very simple tool that consists of a punch, die, and screw. There are three different drive systems: manual, ratchet, and hydraulic. [2]

5. Reamer - Wikipedia

   en.wikipedia.org/wiki/Reamer

   Other holes, reamed slightly larger in other parts, will fit these pins accurately, but not so tightly as to make disassembly difficult. This type of alignment is common in the joining of split crankcase halves such as are used in motorcycle motors and boxer type engines. After joining the halves, the assembled case may then be line bored ...

6. Hole punch - Wikipedia

   en.wikipedia.org/wiki/Hole_punch

   This is a single-hole punch which also crimps a metal fastening loop around the hole, similar to a rivet. It is used to permanently secure a few sheets of paper together. A similar tool, generally known as a holing pincer, is used in animal husbandry. A common application is to attach an ear tag to a livestock animal.

7. Automatic center punch - Wikipedia

   en.wikipedia.org/wiki/Automatic_center_punch

   Marking and starting a hole for drilling without the bit "walking" out of alignment; Letter stamp sets; Glass-breaking tools used in rescue work and a common tool for a car thief. Impact tool for hardness testing [21] Pin presses for electronic assembly [22] [23]