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  2. Mortise lock - Wikipedia

    en.wikipedia.org/wiki/Mortise_lock

    The two main parts of a mortise lock. Left: the lock body, installed in the thickness of a door. This example has two bolts: a sprung latch at the top, and a locking bolt at the bottom.

  3. Medieval weights and measures - Wikipedia

    en.wikipedia.org/wiki/Medieval_weights_and_measures

    Before Roman units were reintroduced in 1066 by William the Conqueror, there was an Anglo-Saxon (Germanic) system of measure, of which few details survive. It probably included the following units of length: fingerbreadth or digit; inch; ell or cubit; foot; perch, used variously to measure length or area; acre and acre's breadth; furlong; mile

  4. Gauge block - Wikipedia

    en.wikipedia.org/wiki/Gauge_block

    The cutting of the blocks to size is accomplished with grinding followed by lapping. Usually no plating or other coating is involved. Usually no plating or other coating is involved. Blocks are kept very lightly oiled, and are stored and used in dry climate-controlled conditions; unplated, uncoated steel gauge blocks can last for decades ...

  5. Speed square - Wikipedia

    en.wikipedia.org/wiki/Speed_square

    Albert J. Swanson invented the "A" Speed Square in 1925 as a carpenter's layout tool. He later founded the Swanson Tool Company to mass produce his invention. [3] Today, the Swanson Tool Company still manufactures and distributes the Speed Square and other carpentry tools from its headquarters in Frankfort, Illinois.

  6. Wrench size - Wikipedia

    en.wikipedia.org/wiki/Wrench_size

    spanner (wrench) size and thread diameter of a hex nut. Width across flats is the distance between two parallel surfaces on the head of a screw or bolt, or a nut, mostly for torque transmission by positive locking. The term width across flats (AF) is used for the following forms: 2-socket = round material with two surfaces

  7. Is It a Cowlick or Balding? How to Tell the Difference - AOL

    www.aol.com/cowlick-balding-tell-difference...

    Cowlick vs. Balding: Key Differences. A cowlick differs from a bald spot in a couple key ways.. First, a cowlick is a natural, normal feature of your scalp that occurs as a result of your genes.

  8. Lever tumbler lock - Wikipedia

    en.wikipedia.org/wiki/Lever_tumbler_lock

    Animation of a lever tumbler lock mechanism. A lever tumbler lock is a type of lock that uses a set of levers to prevent the bolt from moving in the lock. [1] In the simplest form of these, lifting the tumbler above a certain height will allow the bolt to slide past.

  9. AOL Mail

    mail.aol.com/m

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!