Abstract: A magnetic coupler having various holding device embodiments to be quickly magnetically coupled and uncoupled with an industrial strength magnetic base that is fixedly attached to a desired nonferrous surface, such as a dashboard of an automobile. The magnetic base includes a nonferrous low or soft durometer shell that encases the magnet. Preferably, the shell's outer surface is textured, which provides friction for superior magnetic coupling with a ferrous disk. If the device to be held is relatively heavy or has a high profile, the holding device/object to be held includes a support collar assembly that is fixedly attached to an external portion of the holding device.