A planer is a woodworking tool used to create flat surfaces on wooden boards. It removes thin layers of material from the wood, ensuring a smooth and even finish. Planers can be manual or electric, with electric planers being more common for larger projects due to their efficiency. In addition to smoothing surfaces, a planer can also reduce the thickness of wood pieces. This tool is essential for carpenters and woodworkers, as it helps achieve precise dimensions and prepares wood for further processing, such as joining or finishing. Proper use of a planer enhances the quality of woodworking projects.