Sanding blocks are handheld tools designed to hold sandpaper flat and evenly against a surface, providing greater control and consistent pressure during sanding. They help achieve a smoother, more uniform finish while reducing hand fatigue and preventing uneven spots. Used in automotive, woodworking, and DIY projects, sanding blocks are ideal for shaping, smoothing, and preparing surfaces before painting or finishing. They come in various shapes and firmness levels to suit different tasks and contours.