Era Double Locking Nightlatch 60mm Finish: Brass Effect Body Brass Cylinder Option:Finish: Brass Effect Body Brass Cylinder Durasoft Handles End Tamper Finger Guard Ground for Durasoft Handles End Tamper Finger Guard Ground for balance Forged Blade Cone spray for delicate watering 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an anti clockwise turn of the key from the inside so securing the lock against forced entry The bolt can be held in the withdrawn position (only) with the use of the snib feature This product is ideal for solid panelled doors An ergonomic internal locking handle which offers added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