Clearance Item This product is a clearance item and so we have limited stock available, so hurry while stocks last! Mortice Door Knob The Frelan Hardware Mushroom Mortice Door Knob on Rose Satin Chrome is so called because of its rounded mushroom shape. The door knob is made from zinc alloy and has a satin chrome finish. The brass finish will last many years with a little tender loving care - as long as the lacquer is not scratched off by rings, keys, rough handling or chemical cleaners, the lacquer will protect the brass base material perfectly. Matching Accessories for the Mushroom ...