A metal keeper prevents this powerful magnet from being attracted to metal items until you choose to use the magnet. Magnets must be used outside of the scan room and away from your MRI's magnetic field. Specifications: 22 Pound Pull>=1,000 Gauss; Magnet: 1"L x 1"H x 1.5"D ; Keeper:1"L x 1.5 " H x 0.125"T ; Handle: 8" Overall Length: 9.25"

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