Dust Corners Dust Corners are small triangular metal fittings designed to cover the tight inner angles of stair steps where dust and debris often collect. By smoothing these corners, they make staircase cleaning easier and more efficient while protecting stair edges. In addition to improving maintenance, Dust Corners also add a subtle decorative detail to traditional stair designs. For more info: https://theomnibuzz.com/how-dust-corners-improve-staircase-cleaning-and-maintenance