2 Mechanical Fisher's Yo Yo Fishing Reels -Package of 2 YoYos- Yoyo Fish Trap made of galvanized steel with a tempered spring that automatically sets the hook when the trigger is released by a fish taking the bait. reels are very popular for catching Crappie and Catfish can be attached to limbs, boat docks, the side of a boat, or any other means that will suspend the reel a couple of inches above the water