Euro Profile Cylinder Mortice Sashlock - Y7000This euro profile mortice sashlock can be operated by a lever handle from either side and the deadbolt is operated by a double cylinder with keys from either side. Made in the UK by Guardian Locks, this lock is available in various sizes and in many finishes. Can be used for both internal and external doors. You will require a single or double sided cylinder to operate this lock. Cylinders sold separately. SIZES AS FOLLOWS: Lockcase Backset Centres