A Flat-head screwdriver is a screwdriver with a flat top, used to tighten or loosen screws that have an "-", notch in their heads. This is arguably the most common tool on the planet—the ubiquitous Flat-head screwdriver. Every junk drawer needs one or two in it. This tip is perfectly sized to fit into a screw with a flat head slot with a corresponding shape. Extra long design enables you to get at those hard to reach screws during engine work or other home projects.