Flush Fitting Retractable Sash Stop, Fitted to the Top Sash, can be placed in two positions to allow for ventillation.Supplied with matching screws.Available Finishes: Antique Brass, Polished Chrome, Polished Brass & Satin Chrome.Please note: When fitting YOU MUST pre drill the screw holes or use a similar sized pozi screw to make the thread of the screw in the window first. Then carefully tighten the screw with a HAND screwdriver.