Each of our thumbturns have been designed to complement our collection of mortice knob sets and lever on rose handles. Suitable for use with a bathroom mortice lock, or stand-alone with a tubular deadbolt. Maximum door thickness: 47mm. Fixing Plate: 51mm x 51mm x 3mm Thumbturn Size: 36mm x 15mm Projection: 35mm Spindle Size: 5mm