This GU Europa multipoint door lock mechanism is one of the most cost effective 4 roller locks on the market. It has a latch and deadbolt and is operated by lever lift. To reverse the latch push a flat bladed screwdriver into the small rectangular slot above the spindle and pull out latch at the same time. Reverse the latch and then reinsert. Features include: * Backset 28 mm * Centres: 92mm * Case height: 195mm * Case depth: Backset + 18mm * Overall length: 2285mm * Distance between outer rollers: 1610mm * Distance between inner rollers: 670mm