A ball press is a device which compresses the testicles. It features two flat pieces which are placed on either side of a man’s testicles. A screw mechanism tightens the ball press. This puts pressure on the testicles. Ball presses can be made from a number of different materials including wood, metal, or plastic.
More About Ball Press
Ball presses are one of many devices used in the BDSM community. A dominant person usually operates a ball press, taking control of the level of compression experienced by a submissive male.