Let me lend you a hand.

On second thought, that one may be a wee bit too small.

I usually just default to Whenua's drills. Thought the Savage Planet claw/talon piece looks like it could have some potential for a smaller crab.

Go away, Aanchir, that's no good.

Bfa's idea is better, I will look at those. But I'm not sure if my entry will even be a crabman...

You'd need to find a better way to blend them into the arm, though. Like that they don't flow well.