Designed like the original slipping ball that legendary trainer, Cus D'Amato used with Tyson to perfect his head movement and an uncanny ability elude punches. Helps develop unparalleled defensive skills. Constructed with an authentic, vintage look, thick nylon rope and 100% genuine leather. The target is 8" (long) x 13.5" (circumference) and comes complete with a heavy-duty 4' cord and S hook.g.