Finishing sanders are power tools used to smooth and finish surfaces, typically wood, before applying paint or varnish. They use sandpaper attached to a flat base that vibrates or rotates, allowing for an even finish. Common types include orbital sanders and belt sanders, each suited for different tasks and materials. These tools are designed for ease of use, making them popular among both professionals and DIY enthusiasts. Finishing sanders help reduce the time and effort needed to achieve a polished look, ensuring surfaces are ready for final treatments. Proper technique and the right sandpaper grit are essential for optimal results.