Case Depth: 90 mm Cover Height: 86 mm Cylinder Backset: 60 mm features: Auto-deadlocking rim nightlatch c/w Cylinder and 3 keys The product is ideally suited for solid and glass panelled wooden doors, as it has been designed with an ergonomic internal locking handle offering added security against forced entry The main lock bolt is automatically deadlocked when the door is closed, preventing the main bolt being retracted by a credit card The inside handlecan be deadlocked by an anti-lockwise turn of the key from the inside so securing the lock against forced entry The bolt can be held in the withdrawn position (only)with the use of the snib feature The bolt cannot be reversed