Zoo Hardware 5 Lever Dead Lock Finish: Satin Stainless Steel The lock is operated by one complete turn of the key BS EN 12209 : 2003 Grade 2 Fire Certification FD30/60 requirements Dimensions:67.5mm (2.5 Inch) Or 79.5mm (3 Inch) Latch Cases Solid Brass Latch & Deadbolt Sintered Steel Follower Sold & Supplied In Singles, Complete With Matching Strike Plate & Fixings Includes Plastic Back Box 2 x Solid Brass keys included Keyed Alike available - Door locks that have the option to be keyed alike make it possible to operate several locks with the same key. This facility takes away the hassle of carrying several keys and can mean that both your front and back doors are operated by the same key