A flathead screwdriver, also known as a slotted screwdriver, is a hand tool used to turn screws with a straight, horizontal slot in their heads. The blade of the screwdriver is flat and tapered, allowing it to fit into the slot of the screw. This type of screwdriver is commonly used in various applications, from assembling furniture to repairing electronics. Flathead screwdrivers come in various sizes, making them suitable for different screw sizes and types. They are often made of steel for durability and may have a plastic or rubber handle for a better grip. Proper use of a flathead screwdriver can prevent damage to both the tool and the screw.