Fits 8Sinn Cage for Sony FX3 Mounts on Single 15mm Rod Built-In Cold Shoe Mount Aluminum Construction The 15mm Single-Rod Bracket with Cold Shoe Mount is compatible with the 8Sinn cage for the Sony FX3 camera. It attaches securely to your 15mm support rod using the two included 1/4″-20 screws. Compatibility8Sinn camera cage for Sony FX3