The Sachtler 100mm Half Ball for Select Sachtler Heads is compatible with the Sachtler DV 8/100 SB, DV12 TB, DV12 SB, and Video 15 SB tripod heads.
A threaded mounting stud and mounting screws are not included. You can use the stud and screws already installed in your tripod head, or you can purchase additional ones separately. The Sachtler model # for the stud is SZU10E2802 and for the screws is D691204121.