Lock'd is arguably the most advanced flourish in the arsenal of Taras Truba. "Interlock" genre, where card packets, fingers and wrists are interweaving, becomes more and more popular in the cardistry community. Similar moves could be seen in the repertoire of Chase Duncan, Dimitri Arleri and Tobias Levin.

In this tutorial video Taras is showing how to perform this flourish, involving only three packets, from different angles. 

Deck used in this video: Seekers.

You can learn the 0:50 flourish on December Boys right now and free of charge.