NEOPowerful permanent magnet in a knurled aluminum holder with handy pocket clip. No. 386 has a high-powered neodymium magnet which is six times more powerful than a cobalt magnet of the same size and density. Ideal for retrieving small steel and iron parts from hard-to-reach areas. Small magnet size actually measures 2/10" x 1/4". Measures 5-1/2" overall.