Case in point: A simple armband filled with magnets called Tool Band-It, to hold nails, screwdrivers and other tools and when you're working on a project.
Tool Band-It has actually been out for some time, but a lot of people, like local contractor Scott Rasmussen had never seen the commercials.
It probably cost pennies to make with 16 magnets sewn between a couple patches of heavy plastic, and trimmed with long strips of velcro to wrap around your upper arm.
"Those are pretty big so that's impressive," said Rasmussen, as the magnets grabbed onto several small hand tools. "Those are heavy, so I'm pretty impressed that the magnets are that strong."
The manufacturer claims the Band-It can hold up to 25 pounds: wrenches, screwdrivers, nuts, nails, bolts, and even a heavy hammer.
When Rasmussen added a heavy contractor's hammer, the magnets held it securely, along with the other tools he's attached to the band.
On a scale of 1 to 4, Rasmussen says he gives Tool Band-it 3 stars, maybe even a 3.5.
The deciding factor over the long-term, of course, will be durability. But for less than $10, that's about what you'd expect.
There are, however, some health concerns with this product. The strong magnets can be risky to anyone that has a pacemaker or other implanted device.
The packaging warns the magnets can also damage hearing aids, computers, credit and debit cards and electronics.
And the plastic band is made of PVC, which contains toxic chemicals linked to a number of health risks, especially for young children. So you should definitely keep it away from kids.