Check out this double-family of sanding blocks! Highly flexible, #34055 is ideal for curved or irregular surfaces. The dense side sands primer or feathers small imperfections, while a soft side handles rib and color sanding. Semi- rigid #34046 offers an aggressive 'cheese grater' design to level fillers and surfaces quickly and effectively. Flip it over for color sanding areas that require some flexibility. Sandpaper wraps around the 5in. x 2 1/2in. blocks with- out adhesive in wet or dry applications.