This 1" Auxiliary Ball Mount Mark II from Ikelite attaches to the Auxiliary Ball Clamp to allow for the connection of additional lightweight accessories in the middle of your strobe arm. The ball has a groove and an O-ring to prevent slipping for a better hold with less force. The mount is constructed from aluminum that has been treated with a Type III hard anodized finish for resistance to corrosion. A stainless steel screw is included. The Ball Clamp is required and available separately.