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  2. 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.

  3. Screwdriver - Wikipedia

    en.wikipedia.org/wiki/Screwdriver

    Each Phillips screwdriver size also has a related shank diameter. The driver has a 57° point and tapered, unsharp (rounded) flutes. The #1 and smaller bits come to a blunt point, but the #2 and above have no point, but rather a nearly squared-off tip, making each size incompatible with the other.

  4. Henry F. Phillips - Wikipedia

    en.wikipedia.org/wiki/Henry_F._Phillips

    After failing to interest manufacturers, Thompson sold his self-centering design to Phillips in 1935. [4] Phillips formed the Phillips Screw Company in 1934. After refining the design (U.S. Patent #2,046,343, U.S. Patents #2,046,837 to 2,046,840) for the American Screw Company of Providence, Rhode Island, Phillips succeeded in bringing the design to industrial manufacturing and promoting its ...

  5. The 9 Best Screwdriver Sets of 2023, Tested and Reviewed - AOL

    www.aol.com/9-best-screwdriver-sets-2023...

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  6. Cam out - Wikipedia

    en.wikipedia.org/wiki/Cam_out

    The Phillips screwdriver design has a tendency to cam out during operation due to angled contact surfaces, which create an axial force pushing the driver out of the recess as torque is applied. Despite popular belief, [2] there is no clear evidence that this was a deliberate design feature. When the original patent application was filed in 1933 ...

  7. Stanley Hand Tools - Wikipedia

    en.wikipedia.org/wiki/Stanley_Hand_Tools

    Stanley is a well known brand of tools and has produced millions of hand planes, saws, rulers, try squares, chisels, screwdrivers, and many other types of tools for consumer and for industrial use. Their innovations include the Bailey plane, the Surform shaper , the PowerLock tape measure , the utility knife , and an unusual multitool known as ...