This symbol is also known as Tri Shakti Symbol since it is a combination of three most powerful symbols known as Trishul or Trident, Om and Swastik. In India the three most auspicious signs are those of "SWASTIK - OM and TRISHUL". Hence, if all these three signs are displayed together on the out side of the main door of any House, Office, Business Premises, Godown, Factory or a Workshop, then it is supposed to be very Lucky and also protects the people living or working inside the premises from all types of Negativities, Evil Energies, Evil Eye as well as from all sort of Problems and Troubles. This sign of "TRISHAKTI" can also be kept in the purse, briefcase etc. with very good result.
The symbol Om is representative of Lord Ganesha who is also known as Vighnaharta which means Remover of all kinds of Obstacles. In Om, the upper arc is said to be the face of Lord Ganesha. The lower arc is his belly. The twisted arc which is on the right side of the Om is his trunk. Thus, Omkara represents the complete physical form of Lord Ganesha. Hence, this symbol provides a very auspicious positive energy at any place where it is displayed and any person who lives or works at such a place where a OM symbol is displayed is able to succeed by the blessings of Lord Ganesha.
The Swastik Symbol is considered as one of the most auspicious symbols as per Hindu Mythology and Ancient Hindu Texts. The swastik (Sanskrit svastika, "all is well") is a cross with four arms of equal length, with the ends of each arm bent at a right angle. The Swastik symbol is very liberally used by Hindus as a Lucky Charm to bring good Fortune, Luck, Well being, Health, Wealth and Prosperity. This auspicious symbol of Swastik has been used since ages in Hindu Art, Temples, Spiritual places and Architecture. This symbol has been carved on Doorways, main doors, pillars and all the Spiritual items and places. This symbol also forms a major decoration for Hindu festivals as well as religious ceremonies. It is a common practice for Hindus to draw Swastik symbols on the doors and entrances to their houses during festivals, which is believed to symbolize an invitation to Goddess Lakshmi.
The Trishul is representative of Lord Shiva's ultimate weapon which is capable of destroying everything that is Evil or Negative and hence, this symbol is said to protect any House, Office or Business premises from any kind of Negative Energies, Evil Eye and Enemies.