Stone Door Knockers
San Francisco-based husband-wife design team of Nerio Festa and Heidi Hummler joined their creative forces in 1994. They design natural, artistic pieces and craft them using a minimal amount of electricity.
Implications - The Stone Door Knocker is an interesting way to spice up your front door and rid you of that pesky doorbell. Also, by not using your doorbell you are conserving energy! The duo that created the stone door knockers also feel that it would look great on bathroom doors and offices.