Nocturnal Lights Ball Joint Connector for Ikelite quick release handles BJ.IKEQRThe 1 inch Ball Arm System Mark II features 1 inch ball components with a groove and o ring to prevent slippage for improved holding power with less force. While underwater, clamps may be finger tightened to keep lighting in place yet allow repositioning without loosening the clamp. All parts are hard coat type III anodized for a long lasting, scratch resistant finish.