Baglamukhi Yantra should be penned or embossed on copper, brorze or Silver or Gold. It is actually worn in neck in addition to retained in the puja ghar. It’s pooja be performed by means of yellow beads, rosary and yellow gown by way of Beej Mantra to be recited day-to-day. https://www.instagram.com/tantramantraaurvigyaan/