This permanent magnet has an adjustable pole spacing and a high field strength arising from a use of two neodymium magnet elements. It comes with a black-finished iron yoke, knurled handles made of high-grade steel and attachable pole shoes. This magnet system can be installed horizontally or vertically. Magnet: 20 millimeter length x 10 millimeter width. Pole shoes: 20 millimeter length x 50 millimeter width. Pole spacing: 2-80 millimeter. Field strength at center of gap: 20 millitesla - 1000 millitesla.