There are several options for opening stone crab claws. If you click HERE you will find our stone crab cracker. This is an industrial-strength cracker, which assists in opening the toughest shells! This cracker is best used for large quantities of stone crab claws. For smaller amounts, you can simply use the handle of a butter knife to open them. Use this with the same force that one would use to hit a nail with a hammer. Take care not to over crack the claws, as this will cause the shells to become embedded in the claw meat.