This matt black thumbturn lock assembly is typically used in a bathroom application for privacy. Integral to this design is an outer egress slot for emergency purposes. The roses each side of the door are a threaded two-part design to aid installation. Designed to accommodate a standard size bathroom sashlock with 57mm lever to thumbturn size. The matt black thumbturn is operated by a 5mm spindle provided. Sleeve bolts for hollow doors and self tapping screws are provided with the 5mm spindle. Matches the matt black Z747-Z749 range of lever door handles.