Arkon Heavy-Duty Magnet Mount Kit for Phones and Other Devices

The Arkon SPHDMAGKIT magnetic kit gives you every piece required to turn an existing 17mm ball mount into a magnetic phone holder. It was engineered specifically for bigger, heavier handsets that demand extra magnetic grip. Inside the kit you'll find a diamond-shaped magnetic head measuring 2" x 1.88" complete with a tightening ring, plus two adhesive metal plates — one round and one rectangular — so you can pick the shape that suits your device. Simply thread the magnetic head onto any 17mm mount ball and lock it down with the tightening ring, then stick one of the metal plates to the back of your phone or case.