The Yale P121 is a window stay clamp in a white finish and is designed for metal casement window frames. The main feature is that it simply secures over the metal stay bracket and screws into the hole on the arm, thus preventing movement of the arm when the window is opened for ventilation or in the closed position at night for added security. Simply use the universal key supplied to lock and unlock. Finish: White 1 x Key https://elecena.pl/product/27145952/yale-locks-p121-window-stay-clamp 2024-11-06 https://elecena.pl/product/27145952/yale-locks-p121-window-stay-clamp 2025-03-06 https://elecena.pl/product/27145952/yale-locks-p121-window-stay-clamp 2025-03-17 https://elecena.pl/product/27145952/yale-locks-p121-window-stay-clamp 2025-03-28 https://elecena.pl/product/27145952/yale-locks-p121-window-stay-clamp 2025-09-06