Yantras are energy centers designed to attract a particular frequency of energy required for a given situation. All the yantras have a uniform pattern containing a central point called bindu, triangle, lotus petals, squares etc.
These yantras are said to represent the gross body of the deity and are specially designed to attract the full efficacy of the Sonar vibrations in the form of mantras, the subtle body of the deity.
The yantra has to be energised by an adept well versed in Mantric discipline. In this process Pranic Energy is infused into the yantra and it becomes a treasure trove of the energy represented by the deity.
Sarva Siddhikara Yantra is a combination of four most powerful Yantras representing the Cosmic energy most desired and sought after by every being.It bestows prosperity and divinity, materialistic progress good health and longevity.
Sri Yantra bestows over all spiritual and materialistic well being on the worshipper.
Lakshmi kubera Dhanakarshana Yantra is essential for attaining wealth by overcoming all the barriers which prevent from the wealth to flow towards a person.
But material wealth alone is of no avail if one is not physically fit and mentally happy. Dhanvantari Yantra ensures a life free from ailments.
Good wealth and Health are at times not enjoyed to its full due to sudden death. Mahamrutunjaya Yantra ensures longevity.
Sri Yantra: Sri Yantra, also known as Sri Chakra, is called the mother of all yantras because all other yantras derive from it. In its three dimensional forms Sri Yantra is said to represent Mount Meru, the cosmic mountain at the center of the universe.
This Yantra is presided over by Lalita Mahatripurasundari, the Supreme Goddess of Sripura. The Sri Yantra is conceived as a place of spiritual pilgrimage. It is a representation of the cosmos at the macrocosmic level and of the human body at the microcosmic level (each of the circuits corresponds to a chakra of the body.) It is hence considered to be most efficacious to attain success and overall prosperity, be it spiritual or material. It represents the entire cosmos embedded in it.
Lakshmi Kubera Dhanakarshana Yantra: This is a treasure of powerful mantras embedded in it for attracting all forms of wealth and prosperity from all corners of the world. Every household and commercial establishment should have this yantra.
Dhanvantari Yantra: Dhanvantari Yantra is drawn with Amruta bijaksharas and Bheshaja mantras and hence acts as a protective talisman from diseases and epidemics and ensures good health and vigor to the worshipper.
Maha Mrityunjaya Yantra: This Yantra is embedded with powerful beejaksharas of Amrutamruntunjaya for warding off untimely and unlikely death and offers protection from man-made and natural factors that act against the worshipper and ensures long life. Please know more about Yantrams on this wiki page