The 1-3/8 Inch X 36 Inch Polished Smooth 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. Aluminum Trim Is Easily Secured To Wood And Concrete Floors With Provided Screw Nails. For Installation On Concrete Floors Use Wooden Pegs (Sold Separately).