Hells Bridge Ball Stretcher

the scrotum is placed through the rings and then locked by a hex key into place, then start rotating the nut on the side of the device that causes the rings to move further apart and thus stretches the scrotum.

The overall length of the superb pain inflicting Hells Bridge Ball Stretcher is 6.38-inches with a max open distance of 4.88-inches between rings and if that's not enough you can tighten the inner screws on the rings to inflict further pain if you sub is still being disobedient.