A hammer is a simple tool used for driving nails into wood or other materials. It typically consists of a heavy head attached to a long handle, allowing for a strong swing. Hammers come in various types, such as the common claw hammer, which has a split end for removing nails, and the sledgehammer, which is heavier and used for breaking things apart. Using a hammer is straightforward: you hold the handle firmly and swing the head towards the nail. This tool is essential in construction and woodworking, making it a staple in any toolbox alongside other tools like screwdrivers and wrenches.