Core77

If you've ever seen a construction worker hoist a manhole cover open, you know why they're built the way they are. Here to provide some assistance is the Magswitch Manhole Lifter System, an ingenious combination of a simple lever and an on-off magnet; the 23-lb. tool will hoist 400-lb. manholes with no problem. And the price? "Very affordable when compared to the cost of injury," says the manufacturer's website. Wonder if that means it costs an arm and a leg.

via tool monger