This Tri-Energy symbol purifies the whole atmosphere. Pyramids that are made on it make it much efficient. It is helpful to remove all vastu faults. We can place it at worship place or at the top of main door. You can affix this symbol on both sides of your main door, on the outer side as a protection for your house. You can carry this on your person, by affixing it in sticker form, on your diary etc., for personal protection and good luck.