Old couple has made a lock weighing over 300 kg with brass and iron in Uttar Pradesh's Aligarh. It took them over one year to make the lock. The couple claims of making the biggest lock of the world. The length of this lock is 6 feet 2 inches and the width is 2 feet 9.5 inches. The key of this lock is 40 inches and weighing around 12 kg. They have spent over Rs 1 lakh on it so far. Couple aspires to make an impressive lock for Ayodhya's Ram Mandir.