Kogha Carp Swing Arm Indicator with spring Excellent swing arm indicator for visual bite indication when carp fishing. This model features a spring mechanism that can be used to apply additional pressure to the fishing line, so that drop back bites are immediately indicated even when fishing long distances. Safety instructions: Not a children\’s toy! This item is intended for fishing purposes only and should only be used by children under supervision. It may contain small parts that could be swallowed! Risk of injury,using the mechanical attachments possible!