CREATE STRONG MAGNETIC BOND: For endless possibilities these steel discs allow you to mount your magnetic phone mount to a non-metal dashboard and other surfaces. Give yourself more mounting options with extra hardware that will allow you to use your magnetic mount in more places securely. MAGNETIC CAR MOUNT FOR CELL PHONE COMPATIBLE: Mounting Discs are compatible with the MobNetic Pro 90 & Mob Mount magnetic cell phone car mount. This will help you make the most responsible way to transport your phone in a car or truck, while you travel or just drive around town. Use GPS and make calls, not having to worry about your phone while driving EASY AND SAFE TO INSTALL: The 3M VHB adhesive tape provides high stickiness to attach to a variety of metal structures and objects. To apply, clean the surface with alcohol wipes, hold Mob Disc firmly on the surface and let the adhesive set in. Secure your expensive electronics in endless locations for your comfort and convenience. PERFECT SIZE