You can use these Outdoor & Car Magnets 30 Mil Square Corners to create quick impressions in the minds of people. Add catchy taglines, quotes or questions to these custom rectangle magnets and leave them in your cars or gift to others. When a driver sees these promotional magnets in another cars body saying 'Is your tire good enough to prevent skidding?' he will surely think about it, this is an effective marketing technique for tires.