Master Magnetics 07270 Alnico Horseshoe Magnet with Keeper, 2 Oz, RedVersatile and powerful alnico horseshoe magnets with compact packaging have small footprints in your display. Each includes hole for mounting or hanging and steel keeper to retain magnetic strength. 2 Ounce 0. 78" tall x 1. 18" wide x 0. 78" deep Red alnico horseshoe magnet with keeper Alnico horseshoe magnets are among the strongest magnets made today & are ideal for science activities, store with keeper when not in use Lifts up to 13 lbs.