Some fishing feeders use springs as part of a trigger mechanism. This mechanism releases the bait or feed when the feeder hits the water, allowing the contents to disperse at the desired location. 

The use of springs in feeders contributes to their reliability and consistency in performance. Springs can help in maintaining the integrity of the feeder’s release mechanism, ensuring that it functions effectively throughout the fishing session. 

Different types of fishing feeders may utilize springs in various ways to cater to specific fishing requirements, such as distance casting or fishing in deeper waters.