150 lb Magnet

Actually, it weighs less than 2 lb, but it will lift a load of 150 lb.

Usually advertised for retrieving boat motors from lakes, it has dozens of more mundane uses such as cleaning up nails around a construction project, sweeping a shop floor of filings and steel shavings, or just to swish over a carpet to find a dropped pin that would otherwise remain hidden until someone happened by in bare feet.

5" × 2" × 1" overall, it has a built-in eye hook for attaching a rope or chain (not included). A heavy-duty tool.