The Intelligent Hardware mortice door security bolt, as know as a rack bolt, comes with a square forend. Designed for windows and doors, it is a great security feature that uses a key to operate. Main Features: Mortice door security bolt, as know as a rack bolt Designed for windows and doors Great security feature that uses a key to operate - replacement keys available Comes with a square forend 60mm in length Nickel plated finish Comes complete with fixing screws