Our Mushroom knob sets are forged from solid bronze and hand finished by our expert craftsmen. A perfect design choice for any home, with many matching products available. Can be used with a multitude of heavy duty locks, latches & thumbturns for various uses within the home. We recommend using a 3", 4", or 5" latch/lock. Designed to match our Mushroom cabinet knobs to create consistency throughout your home. Knob Size: 57mm Dia. Projection: 55mm Rose Size: 57mm Spindle Size: 8mm (Threaded)