The Nauticam one inch ball adapter is a perfect complement to the Nauticam Easitray and Flexitray handle systems. The shape of the base of this ball adapter prevents rotation or loosening of the adapter when manipulating strobes, lights, or arms. Includes the 8mm mounting bolt. This item will also work with Nauticam's older style tray, the Nauticam Tray with Left Handle for NA-NEX5 (and other smaller sized cameras).