Nidus Wentworth Knob Passage Set WDF Nidus door hardware is innovative and provides a modern look to any home. They offer a great selection of levers, locks and door accessories. As experienced locksmiths we have purchased their door furniture for many years, having confidence both in the company and its products. Specifications: Suits standard 50mm hole (and up to 54mm hole) Made from a metal diecast material Backplate Diameter: 60mm Knob Diameter: 53mm Projection: 60mm Available Finish: Gold Polished Chrome Satin Chrome