The From the Anvil Secure Stops (Pack of 4) Black is designed to restrict the movement of a sash window. It can be fitted to the frame/box and prevents the sash from being opened beyond that point - this is ideal for use on upper floor windows adding peace of mind and extra security. The insert diameter is 10mm, the stop projection is 19mm and the strike plate size is 26mm x 19mm (2mm thick). Sold as a pack of four, all fixings are included and this will be enough for two windows. Black Secure Stops The secure stops have a black finish - this is baked in a high-temperature oven to give it go...