Cast Iron Door Knob These Cast Iron Door Knobs are great for any upcycling project. A rustic style cast iron pyramid knob, ideal for upcycled modern or dated furniture pieces. Because these pyramid knobs are non-galvanized, you can spray paint them any colour you want to match your furniture. Transform your existing Cabinet, wardrobe, locker... into a new look. This traditional cast iron knob is strong and long-lasting, and it can completely transform a piece of furniture. Dimensions: 2.5cm x 2.5cm x 2.5cm Check out the rest of our large range of door knobs we have in stock.