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Why Is It Called a “Phillips Head” Screwdriver?In 1933, Phillips obtained the rights to a socket screw invented by John Thompson that had a cross-slotted rather than slit head. To turn the screw, one had to use a tool that resembled an arrow ...
15don MSN
Learn how to use a screw extractor, and no broken or stripped fasteners will ever slow down a DIY project again.
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