Union 3 Lever Mortice Deadlock Polished Brass Finish 2.5" Option:Satin Chrome Finish 2.5" preventing the main bolt being preventing the main bolt being retracted by a credit card The inside handle can be deadlocked by an anti clockwise turn of the key from the inside so securing the lock against forced entry The bolt can be held in the withdrawn position (only) with the use of the snib feature This product is ideal for solid and glass paneled doors An ergonomic internal locking handle which offers added security against forced entry Lightweight The 2177 Mortice Lock is for use on timber doors hinged on the left or right Keys are suitable for use on doors up to 54mm thick May be supplied master keyed