The list of yantras in this Mahayantra is as following:-

    1. Sri Baglamukhi Yantra (centre)
    2. Shree Yantra
    3. Shatru Vijay Yantra
    4. Vahan Durghatna Nashak Yantra
    5. Ketu Yantra
    6. Shani Yantra
    7. Rahu Yantra
    8. Kaalsarpyog Yantra
    9. Geeta Yantra
   10.Sri Ram Raksha Yantra
   11.Beesa Yantra
   12.Matsya Yantra
   13.Sri Ganesh Yantra

Size of this yantra : 8" x 8"
Beej Mantra for this Yantra  :- "Mrityunjaya Mahadev Traahimaam Sharanagatam
                                          Janam-Mrityu Jara Vyadhi Piditam Karmbandhane"

Pran Pratishta (Energization) and Puja of Yantra :

Since a Yantra is a Man-Made object, it requires energization to infuse potency and power to benefit the owner. Before sending the Yantras, we get Pran Pratishtha done by learned Purohits (Priests) without any extra charges. This is done by reciting Mantras as prescribed by Vedas, as well as Homa for the respective Devi / Devta as per Yantra.

When you receive the Yantra, you need to also worship the Yantra as follows:

1. Purify your body and start with a clear and positive frame of mind.
2. Find a place on the floor facing east, where you will be undisturbed.
3. Light Incense / Diya 
4. Lay  fresh flowers and a fresh fruit on the altar.
5. Open the Yantra and place it along with the image of the deity of yantra and your ISHT God.
6. Take some water and sprinkle it on yourself and then on the Yantra using the leaf of a tree.
7. Close your eyes and fix the image of the diety in your mind. Now with all sincerity, ask God to grant you the desire of your life that you wanted to be fulfilled in  your own language.

Now chant the specific  BEEJ MANTRA  of the YANTRA  at least 9 times