Carpet trim easily covers a seam or gap between two flooring surfaces of unequal height. Carpet trim prevents carpet edges from fraying, vinyl floor seams from curling and creates a smooth transition between different flooring surfaces. Secure to wood floors with provided Screw Nails. For concrete floors, install with screw nails & wood pegs (wood pegs sold separately). Each trim piece is 2 In. wide with lengths of 36 and 72 In. available.