Hand tools are manual implements and devices designed for a wide range of tasks and applications. They are operated by hand and do not require electrical power. Hand tools are essential for various industries, DIY projects, and everyday tasks. Here are some common types of hand tools and their functions:

1. Screwdrivers: Screwdrivers are used for turning screws and fasteners. They come in various types, including flathead and Phillips-head screwdrivers.
2. Hammers: Hammers are tools used for driving nails, shaping materials, or breaking objects. There are different types of hammers, such as claw hammers, ball-peen hammers, and sledgehammers.
3. Pliers: Pliers are versatile tools used for gripping, bending, and cutting objects. Types of pliers include slip-joint pliers, needle-nose pliers, and wire cutters.
4. Wrenches: Wrenches are used for turning nuts, bolts, and other fasteners. They come in various styles, such as adjustable wrenches, socket wrenches, and pipe wrenches.
5. Measuring and Marking Tools: These include tape measures, rulers, and squares for measuring and marking materials accurately.
6. Levels: Levels are used to determine if a surface or object is level or plumb, ensuring accuracy in construction and carpentry work.
7. Saws: Hand saws are used for cutting wood, metal, or plastic. Examples include crosscut saws, hacksaws, and coping saws.
8. Chisels: Chisels are used for cutting, shaping, and carving materials like wood or metal.
9. Scissors: Scissors are cutting tools with two blades used for precise cutting of paper, fabric, and other materials.
10. Awls: Awls are used for making small holes in materials or marking points for drilling or fastening.
11. Utility Knives: Utility knives are versatile cutting tools used for a variety of tasks, from opening boxes to cutting materials.
12. Screwdriver Sets: Screwdriver sets contain multiple screwdrivers with different tips and sizes for various applications.

Hand tools are valued for their precision, control, and versatility. They are essential for construction, woodworking, automotive repair, plumbing, electrical work, and various other trades. The choice of hand tools depends on the specific task, and a well-equipped toolkit is indispensable for both professionals and DIY enthusiasts.