Jai Shree Krishna Jigerji,
I have also read somewhere about this will explain here...
A Shankhya, named "Panchajanya", held by the upper left hand, which represents creativity.
The Panchajanya is the originator of the five elements or Panchabhoota - water, fire, air, earth and sky or space.
The sound that evolves from blowing this conch is the primeval sound of creation.
The chakra, a sharp-spinning discus-like weapon, named "Sudarshana", held by the upper right hand, which symbolizes the mind.
The name Sudarshana is derived from two words - Su, which means good, and Darshan, which means vision.
The chakra as a weapon thus indicates the necessity of destroying one's ego and illusory self-existence and developing the vision to identify the eternal truth.
The discus has six spokes and symbolizes a lotus with six petals, thus representing the power that controls all six seasons.
A mace or Gada, named "Kaumodaki", held by the lower left hand, which represents individual existence.
The mace symbolizes the primeval force from which all mental and physical strength is derived.
A lotus flower or Padma, held by the lower right hand, which represents liberation or dispersion.
The lotus symbolizes the power from which the universe emerges. It represents the concentration of truth or Satya, the originator of the rules of conduct or Dharma, and knowledge or Gyana in a single symbol.
But I don't no about hands, why the two hands are pointing up wards and other two are pointing downwards.
Waiting for ur reply.
Thanks
Jai Shree Krishna
Kavita...