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an anti clockwise turn of the key from the inside so securing the lock against forced entry the bolt can be held in the withdrawn position only with the use of the snib feature this product is ideal for solid panelled doors an ergonomic intern