Singing Bowls can be used as a bell for mindfulness before, during or after a meditation session. They can also be used as a cleansing tool for energetically cleansing crystals or areas of a room.
From Indian Philosophy, chakras are centers of spiritual power (energy) in the human body. The main chakras number 7 from the base of the spine to the crown of the head, although there are considered to be many secondary chakras within and outside the body.