The Genuine Winkhaus Replacement 35/92 Latch & Deadbolt Split Spindle Lock Box Centre Case is a precision-engineered centre gearbox designed to restore smooth, secure operation to your existing multipoint door lock. Built for reliability and perfect compatibility, this Winkhaus lock box features a 35mm backset, 92mm (PZ) centre and split spindle operation for dependable performance on lift lever doors.