When both the hands are crossed in Kartarimukha Mudra we get the Kartariswastika Hasta.
Lets take a look at the viniyoga shloka
shakhasu chadrishikhare vriksheshu cha niyujyate
According to the the shloka karariswastika help to show
- Stems and branches of the trees
- A huge tree
- A hill top or its peak.