A Board with nails (Sadhu Board) appeared many centuries ago in India as a sadhus ascetics practice testing the determination and strength of the spirit.
Sadhu Yoga helped sadhus develop:
•Fearlessness
•Strong nervous system
•Clear and decisive mind
We call this practice “fire board (Nail Board)” because of the fire-feel-like energy released through the feet while standing on nails.
Sadhu yoga board is an excellent tool which might help you
Work with your intentions
Improve energy flow
Removing energetic blockages in the channels (which are often cause of diseases)
Heal and strengthening the body
Increase sustainability of attention through deep meditation.
Getting to know a special state of consciousness somehow resembling a light trance.