[swarmee]

I always used pliers to hold a corner up by the flip (top right of slab), then held the card down with my left hand while twisting the pliers upward until it snapped a corner off. I made sure to put it in a plastic bag first to catch the shards. Once that corner was snapped off, I inserted a flathead screwdriver into the flip down the slot for the flip. Then continued to rotate the screwdriver until it popped the flip compartment. One the top is cracked, move the screwdriver down from the top and rotate it until the sides start to crack. Then just keep working it until the card is free.