Get additional devices iRangeSports ready, by getting one of these. The Disc packs a strong magnetic punch. So much so that it will allow for the use of tablets up to 12.9 inches. The steel disc creates a strong magnetic connection to the magnet on the iRangeSports products. It attaches to the device of choice through the 3M's VHB double adhesive. This ensures a solid attachment to larger and heavier devices.