All magnets are not created equal! Our rare-earth super magnets are the world's strongest . . . supplying up to 10 times the energy of traditional Alnico magnets. You can easily repower, restore and improve your old motors performance by replacing their original Alnico magnets with these Super Magnets. Simply slide out the old magnet and slide in the new ones. They're 1/8 inch thick x 1/4 inch wide x 1/2 inch long, so they fit the popular Pittman DC-60 and Mantua-Tyco open-frame model locomotive motors perfectly. Triple-coated with Nickel-Copper-Nickel for maximum durability and protection again corrosion. Magnetized through the 1/8 inch thickness. Approximate pull force: 6.5 lbs. each. Fits a wide assortment of motors in addition to those mentioned above.