1 inch Ball Head Adapter 1/4" M5 Adjustable Screw Fixed Mount for GoPro SJCAM
It can be fixed by a ball clamp. This ball head uses screws to be fixed on the bottom plate, which is more stable. Movable Screw Length ball head. 1x ball head adapter. Nylon Ball Head Mount with 1/4" screw Hole or 1/4" screw .