From the Anvil Pewter 8.5" Quadrant Stay (Pair) from B&Q

From the Anvil

Secure your fanlight windows with ease. This window stay is designed to be fitted to the frame, effectively restricting the movement of bottom-hung fanlight windows when opened. Crafted from durable mild steel and finished in a stylish grey, it offers both functionality and longevity with a 5-year guarantee. Sold as a pair and supplied with matching wood screws, installation is straightforward. Key Features: * Restricts fanlight window movement * Fitted to the frame * Made from mild steel * Includes matching wood screws Product Summary: From The Anvil window stay for bottom-hung fanlight windows. Grey mild steel construction. 8-inch size, sold in pairs. Includes screws and a 5-year guarantee.