Use with confidence on virtually any non-porous surface. Withstands oil, grease and friction without loss in legibility or brightness. Water-resistant, weather-resistant marks. High-quality, oil-based, permanent paint. Comfortable grip 'N squeeze flow control. Available in many vibrant colors. Heavy-duty, rollerball tip. Marking range: -50 degree through 150 degree. (-46 degree to 66 degree).