Leveling tools are instruments used to determine whether a surface is horizontal (level) or vertical (plumb). Common types include the spirit level, which contains a liquid-filled vial with an air bubble, and the laser level, which projects a straight line of light. These tools are essential in construction, carpentry, and various DIY projects to ensure accuracy and precision. Using leveling tools helps prevent structural issues and ensures that installations, such as shelves or cabinets, are properly aligned. They are widely used by professionals and hobbyists alike, making them valuable for anyone working on home improvement or construction tasks.