CNC aluminum ball ( Dia. 26mm) with black anodized finish. The round plate offers extra support and stability for cameras. The male 1/4"-20 threaded steel stud matches most standard camera and camcorder female threads found on the base of the camera. Thanks to the flexibility of the removable knurled knob for fitting into different depths of 1/4’’-20 female thread, all cameras and camcorders are able to be kept in place with ease and convenience.