Era Double Locking Nightlatch 40mm Finish: Polished Chrome Body Chrome Cylinder Option:Finish: Polished Chrome Body Chrome Cylinder They feature an ultra reliable They feature an ultra reliable tough and durable repairs Resists shrinking and cracking Can be stained The Double Locking Nightlatch is designed to replace most existing front door locks The main lock bolt is 'automatically' deadlocked when the door is closed 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an anti clockwise turn of the key from the inside so securing the lock against forced entry The bolt can be held in the withdrawn position (only) with the use of the snib feature This product is ideal for solid and glass panelled doors An ergonomic internal locking handle which offers added security against forced entry Interior & Exterior Material: Zinc Alloy Fixings included 10 year guarantee and warranty