The QS-65GH Quick-Release Plate fits the dual-locking quick-release element of the GH-100 Pistol-Grip Ballhead. The plate serves as a replacement part or can be used to shoe an additional camera, so you can quickly and easily switch out one camera for the other on your GH-100 head. Featuring a standard 1/4"-20 screw to fit virtually any camera, the QS-65GH plate measures 1.97" (50mm) in diameter.