It is used to meditate in any spiritual exercise. It accumulates wind in it as it is hollow from within. As a result, the things kept under a pyramid remain protected for long. Pyramids of metal and stone are used to have one’s desires fulfilled. In Tantrika exercises, Pyramids of copper, brass and Panchadhatu give better results. Iron and aluminium pyramids are not allowed in worship. Pyramids are also used to ward off the different faults in Vastu. These are kept in a direction to strengthen it. Wooden pyramids are also said to be very effective.