Copper Nails are usually used for Tantric activities and Vastu Home and Office. It is also used in the legs of beds for malefic effects of Sun/Mars etc.It is believed that Rahu disturbs the night sleep. In order to keep the Rahu under control the Copper Nail [Mars] have been advised. As we all know that it is the mars alone which can keep the Rahu under control as a mahout keeps an elephant under control. The Tamba keel on the four bed-posts will act as a guard against the mischief of Rahu during the sleep.Tamba keel) by these nails are the solutions provided to overcome complicated situations. In Indian Astrology the main remedies include – Mantra, Tantra, and Yantra, and these nails are treated as the part of the Yantra.