A spinning reel equipped with a baitfeeder feature (AKA a baitrunner) has two drag systems. There’s a primary drag on the end of the spool and a secondary drag built into the back of the reel body. The secondary drag is activated by a lever which changes the drag to a very light setting almost free spooling but as soon as you begin to crank, it immediately switches to the primary drag.
So Why Would Anyone Want A Spinning Reel With With Two Drag Systems?
The secondary drag system is great for free lining bait out through with a rip current or just carried out with the undertow. The baitfeeder drag allows the bait to flow out through the rip where predator fish are staged up waiting to feed.
When a fish picks it up the primary drag takes over as soon as you start to turn the crank. This is a very effective way to fish. See the diagram below.
Even if your not free lining bait, let’s just say you have your surf rod sitting in the sand spike waiting for a strike.