This Knocker is called brass kalash door knocker and Amrit kalash door knocker also. This door knocker made by pure brass metal. Diamond cutting workmanship is also included to enhance its beauty. In Indian mythological traditions, the "Amrit Kalash" is believed to be related to the churning of the ocean in which Lord Dhanvantari appeared with it in his hands. Some people may include additional religious and cultural motifs.