The specialist in focus here is an expert of the cast iron business. He deals in everything from gates to fences, benches to lamp posts and tables to spiral stairways. Mr. Mhyn has done it all! Mhyn is actually an acronym for Mohammed Hanif Yusuf Nullwala. One of the most prominent spiral staircases I have designed is for the Pada Mohalla Masjid in Panvel, it is the only one of its kind which is 9 meters in diameter, he proudly declares.