The Union 5 Lever Mortice Rollerbolt Sash Lock C-Series 80mm are suitable for use on timber doors hinged on the left or right & are also suitable for use on doors up to 50mm thick. The lock has a deadbolt operation & is locked or unlocked by key from either side with the latch bolt being withdrawn by a lever handle from either side. It has force resistant, anti drill, anti-pick & anti-saw security features & is available with square forend & striking plate with a 14mm bolt throw. They are also pierced to accept bolt through furniture. This lock is recommended by insurance companies, kitemarked to BS3621: 2007 (British Standard) & has been approved by the police Secured by Design initiative. It is also covered by a 25 Year guarantee. Please note: Image shown is Satin Chrome option.