The From the Anvil Twist Cupboard Knob Pewter is suitable for hand-crafted cupboard doors. The overall knob size is 30mm and the projection is 41mm. The knobs are sold individually complete with M4 screw. Pewter Cupboard knob The knob has a pewter patina finish - this has anti-corrosion properties and can be used internally or externally. To remove dirt deposits, simply wipe over with a lightly oiled cloth from time-to-time and this will restore it to its original condition. Do not use any form of aerosol spray or metal cleaner.