This was a concept I stole from the TV show, Stargate. It's modeled after the Goauld hand device.
seen here:
My version uses clear quartz as a center piece since it's said to amplify energy. This is my alternative to using a wand.
It can be used to channel energy, store it and virtually anything you can imagine. I also use it as a tool when creating astral temples, or doing energy manipulation. It simply amplifies and acts as an extension of myself.