The trim free edging flange creates a surface that a lawn mower wheel can travel over, allowing you to mow all grass up to the side of the edging, which eliminates the need to string trim! Trim Free Landscape Edging, 20ft Interlocking Brick Sections, Blocks Grass and Weeds, Sand Trim Free lawn edging creates a beautiful border that enhances the aesthetics of any lawn or garden! Each piece is easy to install - simply tap in the included spikes with a hammer or mallet to anchor the edging.