These banjo-shaped window stays have the flashed copper treatment which dates them from about 1900 to 1920. They are actually steel with a copper finish and a black lacquer flashing. This pair is in very good shape and in working order.
A stay is screwed to the edge of the window, or sash, one on each side. When the lever or arm is engaged, the base is pushed up against the frame which holds the window into place. The stays can work as a locking feature or can hold the window open, depending on the position of the window.
The screw holes are 1 1/2 inches apart. The base that pushes up against the frame is 1 1/2 inches long and 1/4 inch wide. The arm or lever projects from the round latch 1 1/4 inches.
Screws will be included.