Netra chakra: is the 2nd chakra. All creations having 2 eyes
Agni chakra: it indicates 3 kinds of Agni(Dakshinam, Ahavaniyam, karshi patyam) hence 3rd chakra.
Baana Chakra: Indicates Manmatha's 5 arrows, each made of 5 different flowers. One will definitely find a carving of manmatha indicating this pillar
Rutu chakra: representing 6 seasons of the year.
Vasu chakra: there are 8 vasus, Apa, Dhruva, Soma, Anila, Anala, Pratyusha & Prabhava. Each representative of the pancha bhootas on earth & the cosmos.
Dishi chakra: Representing the 10 directions including sky & earth.
Though access to the pillars is shut in Hampi due to abuse by ignorant public.