All these blessing strings were blessed with many thousands of OM MANI PADME HUM mantras, as well as Namgyalma mantra, the five powerful mantras and others.
These blessing cords should not just be taken like a custom and put on your altar or in a container. They should be worn; the idea is for them to touch your body. There are so many benefits of these mantras and they can purify negative karma. So, these blessing strings can purify negative karma and your suffering can become less.
Also, when a person or animal dies or has died, you can put the blessed string on the body. Even if the being died a long time ago, you can still put it on the body, as it purifies the negative karma. Even if the consciousness is not there, but is somewhere else, no matter how far away it is, it still has an effect.
When you do a puja for someone who has died, using the person’s bones or ash, although the consciousness is not there and maybe hasn’t been there for a long time, the blessing string still has an effect on that person’s consciousness.
I emphasize to use blessing strings especially for wearing or for pujas for animals or people who are sick, dying or who have passed away. If we don’t explain all the benefits, then maybe people will just put them in a box.