A screwdriver is a hand tool used to insert and remove screws. It consists of a handle and a shaft with a tip that fits into the head of a screw. Screwdrivers come in various types, each designed to work with different screw head types, such as flathead, Phillips, Torx, and hex screws, making them essential in construction, electronics, and DIY projects for assembling and disassembling objects.
The screwdriver has evolved from earlier tools used for turning screws. Initially, simple flathead screwdrivers were developed, and as screw designs evolved, so did screwdrivers. Phillips and Torx screwdrivers came into existence to accommodate different screw head shapes, and over time, screwdrivers have become more specialized and user-friendly, with ergonomic handles and magnetic tips, enhancing their utility and ease of use.
The main purpose of a screwdriver is to turn screws, which are used to fasten or unfasten parts in machinery, furniture, electronics, and construction. They are used to assemble furniture, repair appliances, build structures, and work on electronic devices by driving screws into or out of materials, holding components together or allowing them to be disassembled for repair or modification.
The screwdriver operates by applying torque to the screw head through the tip. The user grips the handle and rotates the screwdriver, transmitting rotational force to the screw. The shape of the tip matches the recess in the screw head, allowing for a secure fit and effective transfer of torque. Some screwdrivers have magnetic tips to hold the screw in place, making it easier to start threading the screw into the material, especially in hard-to-reach or overhead positions.