Window Hardware from the Stonebridge Ironmongery collection. Window Fasteners, Window Stays & Espag Handles for your casement windows. Choose from four classic designs: Arundel, Cotswold, Curl & Padstow. A universal window stay lock is also available and is suitable for all of the window stay designs. Stonebridge is a premium range, hand forged in high quality steel with a unique Armor-Coat® advanced protective finish. The ideal choice for home renovations and new builds. See also the co-ordinating range of Lever Door Handles.