For a small magnet this is strong. I tested it by lifting a 25lb weight. The pull of the magnet made it slap the weight and magnet cracked in 3 pieces, it is still holding together, but for how long? Used this off a boat under a bridge, found some rebar and nails :(. Still lots of fun for me and my 2 girls, we bought 3 of these:). Worth the money in my opinion.
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