Copied from an 18th Century round knob with cupboard turn mechanism.  This knob is also available with a modern steel thread and nut as an alternative to the traditional thread (copied directly from the period original).  The modern steel alternative makes installation easier if using in a kitchen, study or other interior design application.

Knob Diameter: 1  1/4″ (31mm)

Backplate Diameter: 1  1/4″ (32mm)

Thread Length: 1  5/16″ (33mm)