This is a two-piece adjustable door strike made from stamped steel and is chrome plated. The adjustability provides a snug fit of door to jamb, stops unwanted rattling noise, and assures engagement of deadlatch function. They may be used on both residential and commercial door frames. Typically, these are found on Roberts Redi-Frame and Timely metal frame door jambs. All necessary mounting hardware is included for a quick and easy installation.