While the Humbler restricts movement, the Ball Buster gives him some freedom to enjoy the delightful clenching of his testicles. With four wing nuts to adjust the pressure and feel, the Ball Buster Testicle Vice offers a variety of stimulation. Made of wood and finished in black lacquer. This patented Testicle Vice is fully adjustable, both when attaching the Ball Buster, and when adjusting the pressure on the testicles.