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  2. Robertson screw - Wikipedia

    en.wikipedia.org/wiki/Robertson_screw

    The internal-drive square socket for screws (as well as the corresponding triangular socket drive) had been conceived several decades before the invention of the Robertson screw and driver. An earlier patent covering both square-socket- and triangle-socket -drive wood screws, U.S. patent 161,390 , was issued to Allan Cummings of New York City ...

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  4. Nut driver - Wikipedia

    en.wikipedia.org/wiki/Nut_driver

    A nutdriver or nut driver is a hand tool for tightening or loosening nuts and bolts. It essentially consists of a socket attached to a shaft and cylindrical handle and is similar in appearance and use to a screwdriver. [1] They generally have a hollow shaft to accommodate a shank onto which a nut is threaded.

  5. Screwdriver - Wikipedia

    en.wikipedia.org/wiki/Screwdriver

    Special combination drill-driver bits and adapters let an operator rapidly alternate between the two. Variations include impact drivers, which provide two types of 'hammering' force for improved performance in certain situations, and "right-angle" drivers for use in tight spaces. Many options and enhancements, such as built-in bubble levels ...

  6. 12 Collectible Toys From the 1970s Worth More Than You Think

    www.aol.com/12-collectible-toys-1970s-worth...

    7. Dungeons & Dragons First Edition. eBay. Launched in 1974, this tabletop role-playing game (RPG) is credited for introducing a new way of gaming that focused on imagination, storytelling, and ...

  7. Yankee screwdriver - Wikipedia

    en.wikipedia.org/wiki/Yankee_screwdriver

    There were 3 different size spring chucks, and therefore 3 different shank size tips or sometimes called points, to fit various models. Generally all tips made by North Brothers or Stanley were stamped with the corresponding number of the model screwdriver they would fit, but the stamped numbers are often difficult to see, so it's a good idea to know the size you need before you set out to ...