CY-04 four-bolt mortice lock from the Big CY range, with a red case and a profile cylinder cut-out, made to set into the edge of a door. Four square deadbolts and a sprung latch bolt throw from a long silver-finish forend, spreading the lock across four points along the door edge. A brass-coloured follower hub takes the handle spindle, and the keyhole-shaped cut-out takes the cylinder that works the deadbolts. Screw holes at each end of the forend fix it to the door. Catalogue code: 37173