This is a marvelously effective ball crusher with a very industrial look. Its operation is simple. Every turn of the screw tightens it a little bit more. Once it is on tight the ring at the end of the screw can be used to hang weights from for even more CBT excitement.
Measurements: 4.5 inches in length, 4 inches in width, opening measures 2.75 inches in width
extreme ball crusher, twist down design, closes completely