A kadia is an Indian wok.
The kadai is normally used for deep-frying, stir-frying, and making curries. It is a round-bottomed heavy cookware with two loop-shaped handles extending from the rim. Larger versions are called 'Kadha'. Nowadays, a smaller version of the same in brass or copper is used to serve rice-based or gravy-based dishes in restaurants serving Indian cuisine.
The traditional Kadai is usually made of thick high-carbon iron, cast iron, brass, or aluminium. Better quality kadais have a heavy bottom where a layer of aluminium is sandwiched between two layers of stainless steel for better and even heat distribution. Nowadays they are also available in the non-stick (Teflon coated) material, and hard anodised aluminium too. Some of them are available with lids too.
Iron kadai
