Brass Staircase Dust Corners | Van Dyke's Restorers
stair dust corners" 3D Models to Print - yeggi
Plain Brass Dust Corner With Choice of Finish | House of Antique Hardware
20PCS Corner Dust Guard for Steps Dust Proof Guard Stair - Etsy Finland
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