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

You're Using the Wrong Screwdriver For Electrical straight slot screwdriver New Flathead Straight Screwdriver Slot Type Slotted Screwdrivers Open Tool for Computer Toy Phone Repairing 6000pcslot · With Handle Or NotYes · Features straight slot 10 x 250mm Thru-Tang Straight Slot Screwdriver

slot game sign up bonus straight head slot with a corresponding shape Different screwdriver sizes are available to fit screws with different-sized slots in their heads