A screwdriver is a simple hand tool used to turn screws, which are fasteners that hold objects together. It typically has a long, thin shaft and a handle for gripping. The end of the screwdriver is shaped to fit into the head of a screw, allowing you to either tighten or loosen it. There are different types of screwdrivers, such as flathead and Phillips, each designed for specific screw shapes. Using a screwdriver is easy and requires minimal effort. To use one, you align the tip with the screw head and turn the handle. This tool is essential in many tasks, from assembling furniture to repairing electronics, making it a staple in any toolbox.