SUPERIOR MAGNETS COATED Black magnetic hooks are coated with three layers of Black epoxy Nickel Copper, which provides a shiny and rust resistant coated steel cup provides protection for the magnet and helps to prevent chipping or cracking.
lovimag
LOVIMAG Strong Magnets,150lb Waterproof Strong Neodymium Cup Magnets with Screws for Wall Mounting,Rare Earth Magnets with Holes for Holding Tools Lifting, Hanging(Silver, 6 Pack)
Nice DesignThe round countersunk hole magnet cup design increases the beauty of the product, the steel shell concentrates the strong magnetic force on one side only, the other three sides are almost non-magnetic, well greatly increase the holding power.