Each time a sledgehammer is executed, edges rotate.
| (Each one of the 2 sledgehammers, in the same row, cancell the other.) | ||
After the 'sledgehammer' algorithm, the cubies on the first face that are rotated can go back to their original position with just one rotation. The other cubies need two rotations to return to their original position.
This property will be used to rotate edges in the final stages of solving the cube."