Hangers, also called bobbins, are very useful accessories to aid in bite indication. They clip to the line and provide a strong visual clue when a carp picks up your bait. When used in conjunction with electronic bite alarms, they double the alarms functionality by signalling "drop-back" bites, which would otherwise be much more difficult to detect. Another benefit is the ability to fine tune line tensioning at any depth, for perfect presentation while staying tuned into what's going on at the end of your line.