Sep 01, 2021 · Type of Drive. Slotted: slotted screws are the most common and simplest type screws with a single slot at the head. Although they are not compatible for heavy use, they are still around. The driver bits are usually measured by the width of the blade in inches like 1/16, 1/8, 1/4, 5/64, 3/16, 3/32, 5/32, 9/32.
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