The original GU Extendable Rhino multipoint door lock mechanism, with a 35 mm backset and 92 mm lock centres. It has a two hook system with 2 outbound rollers outside of the hooks, individual keeps and is non-night latch (single spindle/lift lever operation). To reverse the latch push a flat bladed screwdriver into the small rectangular slot above spindle and pull out latch at same time, then reverse it and reinsert. Features include: * Centres: 92mm * Backset: 35 mm * Case height: 195mm * Case depth: Backset + 18mm * Overall length: 2285mm * Distance between outer rollers: 1575mm * Distance between hooks: 1230mm