Cock and Ball Crusher Board Clear from the Master Series. For the most intense ball crushing play get this acrylic cock and ball crusher. This cock and ball board can apply pressure to both the cock and balls or just the balls, by simply inserting your cock and balls through the back hole. Then screw down the wingnuts to apply more and more pressure. If you desire you can have only your balls crushed you can simple slip your cock through the handy cock hole on the other acrylic board. The both plates of the board are made of durable clear acrylic. Both plates measure 5 inches in width and 7 inches in length. The cock hole measures 1.75 inches in diameter and the ball hole measures 2.25 inches in diameter.