Decorative Star Dust Corner For Stair Steps with Polished Finish | eBay
20PCS Corner Dust Guard for Steps, Dust Proof Guard, Stair Corner Dust Guard, Dust Corner Protector for Furniture and for Home Wall Edges - Etsy
Dust Corners - Stair Dust Corners | House of Antique Hardware
Stair dust corners introduced at the end of the 19th century to make sweeping easier. They keep dust from accumulating in the corners : r/Damnthatsinteresting