Profile Sanding Set. 22-piece set for sanding in grooves and on external radii. Contents: 1 holder with 6 different profile inserts. 1 x V-shape for 90° angles, 1 x trapezoid shape for tongue and groove joints, 1 x straight shape for profiles, 1 x convex shape (large), 1 x concave and 1 x convex shape (small), together with 5 of each sanding sheet. grits 80, 120, and 180.