The Panchakshari Manthram is know in five holy Symbols, that is the supreme mantra for all the Shiva devotees. The Five Symbols used in this Manthram are "Na Mah Shi Va Ya" Shiva means auspiciousness and perfection.

Jo Bole Om Namah Shivaya, Sab Kashton Se Mukti Paaye! 
The Panchakshari Manthram is know in five holy Symbols, that is the supreme mantra for all the Shiva devotees. The Five Symbols used in this Manthram are "Na Mah Shi Va Ya"
Shiva means auspiciousness and perfection. And this mantra refers to the god who is perfect without any kind of dependence. Namah Shivaya States that “ Pranamams to the auspicious and perfect god. This holy mantra is the heart of Vedas. It is the core of very famous chapters of Vedas. ‪Meaning of which is I salute to the Lord Shiva who is every thing in the universe. This mantra could be chanted as it is as panchakshara or could be chanted along with the pranava OM as shadakshara mantra, Om Namah Shivaya. In fact it is to be noted that pranava itself is panchakshara mantra. We tend to become what we keep thinking about", when one chants the Sacred panchakshara that hails the God as Perfection and Auspicious, it would take one towards that Blissful Perfection. It takes to the union with the Supreme God. What else can be more rewarding! Even the worst sinner would get corrected and get to the glorious states if chants this mantra. Full of love, with melting heart, tears brimming, one who chants leading them to the Glorious path, the name that is the real essence of the four Vedas is the mantra Namah Shivaya.
Om Namah Shivaya Om Namah Shivaya Om Namah Shivaya!