Magnet - Tooth Shape (1.75 x 2.25) - Outdoor Safe. Keep your message in front of your clients inside and outside. Personalized with your services & contact information, an outdoor magnet is an effective marketing tool. Magnet keeps selling long after other products have been tossed away and forgotten. TuffMag (TM) magnet is 30 mil. thick & will work on cars or any other metal surface. Perfect for outdoor applications-water repellent, fade resistant & outdoor safe.