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  2. New York roof hook - Wikipedia

    en.wikipedia.org/wiki/New_York_roof_hook

    The New York roof hook (or halligan hook) is a firefighting tool used mostly for rooftop operations including vertical and horizontal ventilation, [1] pulling and prying. Developed in the 1940s by FDNY Deputy Chief Hugh Halligan, a prolific firefighting inventor who also designed the Halligan bar , the tool is composed of a 6-foot (1.8 m) long ...

  3. List of screw drives - Wikipedia

    en.wikipedia.org/wiki/List_of_screw_drives

    Slot screw drives have a single horizontal indentation (the slot) in the fastener head and is driven by a "common blade" or flat-bladed screwdriver.This form was the first type of screw drive to be developed, and, for centuries, it was the simplest and cheapest to make because it can just be sawed or filed.

  4. Roller cone bit - Wikipedia

    en.wikipedia.org/wiki/Roller_cone_bit

    A roller-cone bit is a drill bit used for drilling through rock that features 2 or 3 abrasive, spinning cones that break up rock and sediment as they grind against it. Roller-cone bits are typically used when drilling for oil and gas. [1] A water jet flowing through the bit washes out the rock in a slurry. [2]

  5. Drill bit - Wikipedia

    en.wikipedia.org/wiki/Drill_bit

    The correct tool to start a traditionally drilled hole (a hole drilled by a high-speed steel (HSS) twist drill bit) is a spotting drill bit (or a spot drill bit, as they are referenced in the U.S.). The included angle of the spotting drill bit should be the same as, or greater than, the conventional drill bit so that the drill bit will then ...

  6. Tool bit - Wikipedia

    en.wikipedia.org/wiki/Tool_bit

    In machining, a tool bit is a non-rotary cutting tool used in metal lathes, shapers, and planers. Such cutters are also often referred to by the set-phrase name of single-point cutting tool , as distinguished from other cutting tools such as a saw or water jet cutter .

  7. The Home Depot Black Friday 2023 Sale Is Already Here—and ...

    www.aol.com/lifestyle/home-depot-black-friday...

    Indeed, the Home Depot Black Friday sale is happening from now through November 29, and the retailer is offering can’t-miss deals on major appliances, power tools and other home essentials.