This is also known as sarva-avesakari. It represents the eminent effulgence within (daharakasa) of the seeker experiencing siva-sakti unison and equanimity.
Blum is the bija mantra of this mudra
extending the sarva- soubhagyadayaka
(provider of all prosperity) enclosure of Sri Cakra.
This mudra is presented by joining and holding the fingers of both the hands together as shown in the above photographs.