I have the magnet used as a door handle on my fridge. To give you an idea of the magnet strength, sometimes the magnet will pop off of the door, rather than open it. Yeah, nowhere close to 400lbs, more like 40ish I'd wager.
Heavy Duty Stainless Steel Keychain Rings - Pack Of 12 With 4-Inch Cable Length
42 Review
Heavy-Duty 600Lbs Double-Sided Fishing Magnet Kit With Rope, Gloves, And Neodymium Rare Earth Magnet - Ideal For Underwater Salvage!
24 Review
πͺ MHDMAG 960lbs Super Fishing Magnets: The Ultimate High Power Magnet Fishing Kit with Neodymium Rare Earth Magnet for River Retrieval, Magnetic Fishing, and More! (Diameter 3.54in / 90mm)
24 Review
Super Strong 650Lb Neodymium Fishing Magnet Kit - Ideal For Magnetic Fishing In Rivers, Indoors, And Outdoors - Large 2.95In Diameter (75Mm)
21 Review