These automatic fishing reels are made of galvanized steel with a tempered and or stainless steel spring that automatically sets the hook when the flat trigger is released by a fish taking the bait.  The reels are very popular for catching Crappie and Catfish.  They 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.  They also make an excellent device for Ice Fishing and gifts for the little ones. These reels comes pre-spooled with 9-12′ of 60# Test Nylon Line .

No survival kit should be without these.
Cost:
Whites Yo Yo Reel $3.40 per reel
Mechanical Yo Yo Reel $3.40 per reel

YoYo Fishing Reel Comparison- White’s Auto-Fisher vs Mechanical Fisher Yo Yo Reel