The carpet trim easily covers a seam or gap between 2 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 Aluminum trim is easily secured to wood and concrete floors with provided screw nails For installation on concrete floors use wooden pegs (sold separately) Durable aluminum withstands high foot traffic areas in the home For use in doorways, room entry ways or other locations where two uneven flooring surfaces meet Screw nails fit firmly in pre-drilled holes for easy installation Can be cut to desired length with hacksaw Consumers and industry professionals throughout the world trust M-D Building products and services, positioning them as the leaders in the weatherstripping, floor and tile trims, perforated aluminum sheets, digital levels, and caulking categories