Original sentence: It is famous for the rust-resistant composition of the metals used in its construction.The iron pillar of Delhi is set up by Raja Dhava in 4th century, a structure  high with a  diameter that was constructed by Chandragupta II (reigned c.The pillar weighs more than 6 tonnes and is thought to have been erected elsewhere, perhaps outside the Udayagiri Caves, and moved to its present location by Anangpal Tomar in 11th century
Edited sentence: The iron pillar of Delhi is a structure  high with a  diameter that was constructed by Chandragupta II (reigned c.The metals used in its construction have a rust-resistant composition.The pillar weighs more than six tonnes and is thought to have been erected elsewhere, perhaps outside the Udayagiri Caves, and moved to its present location by Anangpal Tomar in 11th century