This black 10 inch curved edge window stay is made for the ovolo frame design usually found on old Jeld Wen, John Carr and Boulton Paul Windows. Key locking design and comes with 4 integral opening positions including one right at the end of the stay for maximum opening. Matching black handles for the ovolo frame are also available separately. Supplied with everything needed to fit to the window including options for flat and angled frame pins if needed.