The term "Dhokra" is believed to be deriving from the word "dhokna", which means to cast. "Dhokra Shilp" is the regional word for the craft of bell metal casting. It is one of the most distinguished craft of Chattisgarh. It is also famous for its traditional lost wax technique which has been carried forward since thousands of years of its origin. Artifacts similar to the present craft form have been discovered at the sights of Mohenjedaro and Harappa. Dhokra shilp is widely practiced by the Ghadwa community of Bastar. The handcraft includes traditional ornaments, animal and tribal figures, idols of the local deities, which are most popular in the region. Earlier bell metal crafts were used for ritualistic and daily use purposes only. The Ghadwa craftsmen used to supply the utensils of daily use to the villagers. Slowly jewelry and forms of local deities also became part of their work. With time the figures of birds, animals, decorative objects and dance poses were added to make the craft more innovative.

For more details:
http://dsource.in/resource/dhokra-shilp