Durga is the Divine Protectress. Typically shown riding a lion or a tiger, Durga has a hundred arms, each with a different weapon of destruction. Yet her face is exquisitely beautiful to behold. The interpretation is that to the pious and the sincere seeker after truth, her sight can produce ecstasy and a variety of beautiful forms. But the negative, harmful or demonic, her countenance is as terrible as Kali, except she shows more weapons of destruction than Kali. http://www.sanskritmantra.com/simple.htm
"Yantra Raj Beesa": Durga Bisa Yantra is of Shri Durga Ambe Maa. Durga Bisa Yantra is a powerful yantra for attaining desires, to remove difficulties and to conquer enemies are the special effects of this yantra. Durga Bisa Yantra bestows wealth and property and protect the person from all sorts of dangers. Worship of this yantra as per Adhayaya 4 sloka 17 of Durga Saptashati (Most powerful and potent collection of mantras dedicated to Goddess Durga created from Markandeya Puran) this yantra removes poverty. Durga Bisa yantra is considered to be very lucky for businessmen as it brings in property and removes all the problems in their way to suceess.