Heat a cast iron skillet with 1/2 cup lard or tallow to medium high heat. Pat the crab dry with paper towel. Place the powdered pork rinds into a large shallow dish. Place the beaten eggs into another large shallow dish.
Dip the crab into the eggs and tap, just so the crab has a light coating. Dip into the pork dust and use your hands to coat the crab well.
Drop 3-4 crabs into the hot oil and cook for 2 minutes, flip and cook another 2 minutes or until crab is cooked through. Repeat with remaining crabs.