Our Singing bowls include a wood mallet. Hand hammered singing bowl sizes will vary, some are thicker, some are thinner. The size and weight given here is an average. SYMBOL: Singing Bowls are one of the ancient Tibetan meditation tools. The pure sounds produced when the rim is rubbed by the mallet is said to put the brain into a meditative state. The vibrations of the singing bowls have the same wave length found in the brain waves that produce feelings of relaxation. This Bowl is made from a combination of 7 metals consisting of Gold, Silver, Copper, Iron, Tin, Lead and Mercury and one interesting thing is that each of the metals denotes the planets: Gold: the Sun, Silver: the Moon, Mercury: Mercury, Copper: Venus, Iron: Mars, Tin: Jupiter and Lead: Saturn.