Need a seriously strong magnet to hold, hang, or organize stuff? The Master Magnetics NACK165 Retaining Magnet is a beast. This nickel-plated neodymium magnet has a massive 150-pound vertical holding force on a flat, clean steel surface (that's like holding a whole person!). It's housed in a durable steel cup with a sturdy single hook attached, perfect for hanging lights, tools, signs, extension cords, or equipment in your garage, workshop, warehouse, or even at a trade show. The overall diameter is 1.65 inches, and it's 2.18 inches tall. Just remember, the holding power is less on thinner or vertical surfaces. It's built tough to resist impact and corrosion. If you're tired of drilling holes or need a temporary but ultra-strong mounting solution, this magnet hook is your new best friend.