Adapter Spigot:
Standard 6.4mm and 9.5mm threaded ends for compatibility
Tripod adapter spigot with universal 16mm diameter
Ideal for use with a variety of stands and grip gear
Attachment (Bottom)
3/8″ screw, 5/8″ (16mm) stud
Top Attachment
1/4″ screw, 5/8″ (16mm) stud
The author hasn't provided the model origin yet.