iShot Pro 1/4" - 3/8" Hybrid Screw Thread Adapter - Converter Reducer Bushing (7-pack) for SLR Camera, Tripod, QR Plate, Ball Heads and MonoPod (AD-1438) 1/4" to 3/8" Convert Screw Adapter Bushing - Package Contents: 7 x Camera Tripod Convert Screw Adapter Metal Thread Adapter with female 1/4" thread to male 3/8" thread - Retrofits All other Major Brands Such As: Monfrotto, Joby, Slik, Velbon, Razorfish and More It works with a Double Head Stud w/ 1/4" to 3/8" thread, and make it work as a Double head stud w/ 3/8" to 3/8" thread Great for Tripods, Ball Heads, Cameras, Photography Equipment and Portable Tripods PLEASE ALSO SEE OUR OTHER OFFERINGS ON AMAZON SEARCH: ishot products inc