This ERA lock is designed for remedial work on timber and composite doors and features 2 hooks. Features a 20mm faceplate and 45mm backset. It uses twin high security hooks for anti separation resistance with a non handed keep set. Comes with a 3 piece lock and keep set, fixing screws pack and a set of packers. Operation: Lift lever or split spindle nightlatch operation. Latch reversal: Undo the screw in the latch to remove. Reverse, reinsert and replace screw. Nightlatch reversal: Remove latch to reveal a small screw. Use a small bladed screw driver to turn the screw 180 degrees then return latch to correct position.