What's the proper name for a flat head screwdriver and why?

straight slot screwdriver   Dan straight slot screwdriver

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And the slotted screwdriver became a necessity Of course, not long after that, most folks realized that if the slotted screw was a workhorse—it Browse Integral Shut-Off - with Lock Shield Screwdriver Slot

fire bird slot review Our slotted screwdriver bits have straight parallel sides for maximum surface contact with the screws  A demonstration of how the slot head screw driver should be used views · 11 years ago