Fits most horizontal and vertical sliding window systems using this design Solid metal (zinc) construction Durable powder coated finish Design exceeds AAMA requirements Mounting hardware not included Vision Industries 8205 sash keeper, designed for use on single hung, double hung and horizontal sliding windows. The keeper is made by the same company that provides the Window Hardware attached to the most popular brand Windows and Doors sold at Home Depot, Lowe's and many other window and door outlets.