A hand tool for turning a screw or other type of fastener, consisting of a handle attached to a metal shank. The tip of the shank is formed specifically to fit into the head of the screw or fastener that can be of a variety of shapes and sizes. There is a great variety of fasteners available and used throughout all industries and continents. Wood Screws, Sheet Metal Screws, Self-Drilling Screws, Drywall Screws, Machine Screws, Socket Head Cap Screws, Hex Head Screws and Set Screws to name a few. ­Almost all are available in a variety of head styles. Flat Head, Oval Head, Round Head, Truss Head, Binding, Fillister, Pan Head and Button Head just start the list. Some of them are available in Standard or Security/Tamper-Proof configurations. Most are available in fraction, number and metric sizes and all require some tool to install or remove them. The shape of the tip is defined as “Tip Type”. There is a unique tip type for every fastener drive type and some for specific head styles. It is extremely important to use the correct style and size screwdriver designed for each fastener