Field configurable magnetic array

A magnet apparatus comprising a plurality of geometrically shaped nested magnetic elements each being of a different size relative to each other and each having a first side with a first magnetic pole orientation and a second side with a second magnetic pole orientation that is opposite to the first magnetic pole orientation, capable of being assembled concentrically to form a single planar magnet array having a treatment surface and an opposing backer surface, the treatment surface having either an all like magnetic pole orientation or a mixed magnetic pole orientation; and a backer plate having a first side and a second side constructed of ferromagnetic material such that when the plurality of geometrically shaped nested magnetic elements is assembled concentrically on the first side of the backer plate each of the geometrically shaped nested magnetic elements that comprise the single planar magnet array is secured to the first side of the backer plate by magnetic attraction whereby the treatment surface of the single planar magnet array is formed opposite to the backer surface of the single planar magnet array that is magnetically secured to the backer plate.