6 Mechanical Fisher Reels and 1 Instruction Booklet. Simply attach to the object of your choice, bait the hook, set depth and trigger, then wait. The Mechanical Fisher does the rest. It sets the hook, and retrieves the fish. It’s like a mouse trap for fish, without killing the fish! Check with your local laws to see if it’s legal to use and always have a fishing license (you can get a license in most Walmarts). Check out the accompanying video to see the yo-yo in action: