Industrial Magnets: what Claude and GPT would buy
Two AI models chose on their own, with no web access. Nobody tested these products: this is what each one says, and how to check it.
They disagree: Claude chooses Eclipse Magnetics and GPT chooses Master Magnetics
In Industrial & Scientific, Claude and GPT choose the same brand in 52 of 107 categories.
Claude Opus 5.5 · October 28, 2026
Eclipse Magnetics (brand)
Eclipse is an established industrial magnet maker whose pot magnets, lifting magnets and workholding products carry realistic pull ratings that suit material handling work.
Not for: Hobbyists who only need a handful of small craft or fridge magnets, where generic bulk packs are fine.
GPT 6.1 Sol · November 10, 2026
Master Magnetics Round Base Magnets (line)
A practical choice for holding steel parts, positioning fixtures, and organizing tools without permanent fasteners.
Not for: Overhead lifting, nonferrous materials, or safety-critical load support.
Claude also lists Master Magnetics among the brands that matter.
Check before you buy
Where to find Eclipse Magnetics
- Newark
- Reid Supply
Shops seen in search results on November 6, 2026. A shop missing here may sell it too. Nothing was checked by a person.
Brands that matter
- Eclipse Magnetics: UK industrial maker of pot, lifting and workholding magnets.
- Master Magnetics: US supplier with a broad range of ceramic, alnico, neodymium and magnetic tools.
- CMS Magnetics: Wide neodymium and assembly range with clear specifications.
- Magnum Magnetics: US flexible magnet manufacturer.
What to avoid
- Unbranded listings with very high pull claims and no grade or test conditions.
- Using bare brittle magnets where they can slam together and chip.
- Hobby magnets used for overhead lifting.
Questions
Why does my magnet hold far less than its rating?
Ratings assume perpendicular pull on thick bare steel; paint, thin sheet, gaps and sliding loads all reduce real holding force.