Sri Gayatri yantra silver pendant for higher education, progress and goodluck red which is in use since

which is in use since the ancient times

are the subject of research and intensive study in the first part

(3) Sri Surya yantra - To get planet Sun work in favour

This means "One who has Sri Durga Bisa yantra can't be harmed by anyone including gods

It has been stated as:

Sri Gayatri yantra silver pendant for higher education, progress and goodluck red which is in use sinceSri Gayatri yantra pendant helps sharpen your intellect and see everything with an enlightened mind. It promotes your overall well being. By the use of this yantra pendant, one cannot be affected by souls, spirits and is blessed with health, wealth and happiness. Its also helps children with higher concentration levels and therefore with better results in studies. Note: The pics shown are of front and back side of this locket. Product details: Metal