A magnetic positioning device is disclosed and claimed wherein two magnetic arms are hingeably connected by an axle connector with locking bolt and nut, and an activation hole with pin inserting through the connection disks having arc-shaped toothed-groove made the selection of frequently used angles straight-forward and easy, when the pre-select angles are built to the “indents” in the toothed-groove, so that the enlarged head on the pin can be used to easily engaging to the selected angle, by pushing toward the spring located inside the hole on the disk. An optional switch is provided on the second end of the magnetic arm for easy control of the magnetic power direction.