This is a Yo Yo. It's a mechanical fisher that is strong as the limb it tied too, usually used for cat fish. It will automatically hook the fish for you and pull the small ones (Under 1'lb) out of the water.
Heres the official explanation.
The Yo Yo is an automatic fishing reel made of steel with a tempered spring that automatically sets the hook when the trigger is released by a fish taking the bait.
You should keep a yo yo or two in your survival kit. Instead of actively fishing, you can set this automatic fishing reel and take care of other things such as improving your shelter. Check back after a couple of hours and retrieve your dinner. Eat a great meal and sleep more comfortably (under the circumstances).
* Stong, lasting, durable
* Stainless steel spring
* Simple and easy to use
* Adjustable line tension
* Fisherman tried and tested for years
* 60lb test nylon line
* Sets the fish and holds automatically
In a survival setting, you can also bait a hook to catch birds and small animals. Don't get squeamish. If you're out of food, you need to eat to keep up your strength and spirits.
"Thomas Jefferson said I had a God-given right to pursue happiness. What makes me happy is to take a mallard's head smooth off at about 20 feet.
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