Hart Design Steel Magnet Washer, 1/4 in. features steel magnet cups and washers designed to enhance the power and versatility of rare earth magnet discs. These steel cups can increase the holding power of rare earth magnets by up to four times, making them incredibly effective for various applications. The washers serve as the strike plate to complement the cups. All cups and washers are countersunk for screwing in, except for the 1/4" cup, which uses a barbed press fit. If you need to remove the magnet later, simply file a notch on the cup’s side to create a pry point for easy lifting. Made from zinc-plated steel and imported, this washer matches a 1/4" magnet with an outer diameter of 3/8" and a thickness of 1/8". The center hole is 1/8" in diameter and countersunk to accept a #4 wood screw. Please note that the cups and washers themselves are not magnetic. Model Number: 47307