17mm ball head holder to convert 1/4 threaded connector plate adapter cell phone ball head holder change screw port accessories

 

 

One head is a 1/4 inch male screw head, the other head is a 17MM diameter ball head female seat; role is to change the 17MM diameter ball head into a quarter of a male screw head, because many camera camera equipment base is to use this size of the female screws, 1 can be multi-directional adjustment of the angle with a variety of diameter quarter-inch base screws of the mother of the DV camera, cell phone bracket, fill light, video equipment, sports camera and other equipment to use