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Flat head screwdrivers were the original screwdriver, possibly being invented around 1460. They were the only type of screwdriver until the early 20th century.

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What are Hex screwdrivers used for?

Hex, or Allen screwdrivers are for screwing and unscrewing Allen head screws.


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There are more than two types, but the main categories are flat head and cross/star screwdrivers. Actually, there are four: flathead or standard, phillips head, hex or Allen head, or Torx or star head. Torx/star head and Allen/hex head fasters are more often than not bolts, differentiated from screws, but there are a number of different styles of actual screws that are manufactured for these two bits as well.


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What are flat screwdrivers?

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Can flat head syndrome cause mental issues later in adulthood?

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A turtle has a flat head so they can be hydrodynamic.


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You need a monkey wrench, screwdrivers (flat and philips), as well as a hacksaw.