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  2. Socket wrench - Wikipedia

    en.wikipedia.org/wiki/Socket_wrench

    Pass-through sockets and ratchets are built for 1 ⁄ 4-inch, 3 ⁄ 8-inch and 1 ⁄ 2-inch sets in both SAE and metric sizes. By using a fine tooth ratchet and socket system that allow a pass-through ratchet to be used as a conventional ratchet handle with interchangeable 1 ⁄ 4-inch and 3 ⁄ 8-inch drives some ratchets can be used with ...

  3. Width across flats - Wikipedia

    en.wikipedia.org/wiki/Width_across_flats

    A few sizes are close enough to interchange for most purposes, such as 19 mm (close to 3 ⁄ 4 inch (19.05 mm)), 8 mm (close to 5 ⁄ 16 inch (7.94 mm)) and 4 mm (close to 5 ⁄ 32 inch (3.97 mm)). In reality, a wrench with a width across the flats of exactly 15 mm would fit too tightly to use on a bolt with a width across the flats of 15 mm.

  4. Wrench - Wikipedia

    en.wikipedia.org/wiki/Wrench

    clamp ratchet spanner An open-ended multi-size ratchet wrench. The ratcheting mechanism allows the nut to be clamped on or loosened with a reciprocating motion; flip the wrench to change the direction of the drive. The wrench takes the advantage of the clamp action to allow multiple sizes in both SAE and metric standards. Each wrench typically ...

  5. Impact wrench - Wikipedia

    en.wikipedia.org/wiki/Impact_wrench

    A variety of impact wrenches, in all common sizes from 1 ⁄ 4 to 1 in (6.4 to 25.4 mm), of different styles, including inline, butterfly, and pistol grip. This "reactionless" ratchet uses a miniature pin clutch impact mechanism instead of a gear reduction. Large 2 + 1 ⁄ 2 in (64 mm) Drive Ingersoll Rand impact vs 1 ⁄ 2 in (13 mm) impact ...

  6. Ratchet (device) - Wikipedia

    en.wikipedia.org/wiki/Ratchet_(device)

    A ratchet (occasionally spelled rachet) is a mechanical device that allows continuous linear or rotary motion in only one direction while preventing motion in the opposite direction. Ratchets are widely used in machinery and tools.

  7. Torque wrench - Wikipedia

    en.wikipedia.org/wiki/Torque_wrench

    They typically have a standard mounting interface that allows for quick changeover from one wrench head to another while ensuring that the torque applied remains accurate. Common interface sizes include 9×12mm and 12×14mm, and interchangeable heads include open-end, ring-end, adjustable, ratchet, etc.

  8. Yankee screwdriver - Wikipedia

    en.wikipedia.org/wiki/Yankee_screwdriver

    The middle size is the No. 30 size, and all numbers with the 30 in them have a chuck shank size of 9/32" (7mm) diameter. The biggest size is the No. 31, and all numbers with 31 in them have a chuck diameter of 5/16" (8mm) diameter. A '1' in front of the number denotes a return spring fitted.

  9. Screwdriver - Wikipedia

    en.wikipedia.org/wiki/Screwdriver

    Phillips screwdrivers come in several standard sizes, ranging from tiny "jeweler's" to those used for automobile frame assembly—or #000 to #4 respectively. This size number is usually stamped onto the shank (shaft) or handle for identification. Each bit size fits a range of screw sizes, more or less well.

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