In the metal manufacturing sector , Diesel Locomotive Works is a major employer . Bharat Heavy Electricals Limited , a large power equipment manufacturer , also operate a heavy equipment maintenance plant . Other major commodities manufactured and traded in Varanasi include hand @-@ knotted Mirzapur carpets , rugs , dhurries , brassware , copperware , wooden and clay toys , handicrafts , gold jewellery , and musical instruments . Important agricultural products include betel leaves ( for paan ) , langra mangoes and khoa ( solidified milk ) .