3 Mukhi Rudraksha, Teen Mukhi bead representing Trinity,

http://www.rudraksha-ratna.com/3mukhi.htm
http://www.rudraksha-ratna.com/hindu_trinity.php 

https://knowingyoga.blogspot.com/search/label/Mukt 

https://harekrishnainfo.blogspot.com/search/label/Muk

http://shivadurga.blogspot.com/search/label/Mukti