Done as part of a practice session with poses of 10 minutes in length.
I love how angular this drawing is! It makes the the hand look very dynamic. The only thing is that I'm having a really hard time imagining how this hand would move -- how the fingers would fold or unfold. This seems like something where studying the bone structure would come in "hand"y; you could emphasize more clearly all the joints while maintaining the angularity of the piece.
neat style. I think the bent fingers work better than the extended digits, maybe an indication of the knuckles would help?