MASTER MAGNETICS NEODYMIUM ROUND BASE MAGNET RB45N-NEOBX – 48 LBS. PULL ROUND BASE MAGNETS ARE POWERFUL, LOW-PROFILE MAGNETS WITH AN ATTACHMENT HOLE IN THE CENTER. ATTACH A HOOK OR KNOB TO POSITION OR HOLD INSPECTION EQUIPMENT, INDICATOR GAUGES, LAMPS, SIGNS, ANTENNAS AND MORE. MAGNETIC ON ONE SIDE. ALL ROUND BASE MAGNETS ARE NICKEL OR NICKEL/CHROME PLATED FOR DURABILITY.