It is believed that wearing Damru locket or keeping it in the house prevents any kind of negative energy from entering the house. It also removes disappointment from a person's life. Apart from this, wearing it increases concentration within the person. If you don't feel like doing any work then wearing Damru will definitely be beneficial.
On any auspicious day of Shukla Paksha, wear it in any temple or in your home temple while chanting 1 rosary Om Namah Shivay.