The yale pm560 british standard 5 lever mortice sashlocks offer a very high level of security and are suitable for use on external timber doors the deadbolt is locked or unlocked by key from either side with the latchbolt withdrawn by lever handle from either side the pm560 series locks are recommended by insurance companies kitemarked to bs3621 2007 and have been approved by the police secured by design initiative these sashlocks also have a 20mm anti saw deadbolt an anti drill case and are pie