Create permanent and accurate marks on virtually any surface with the uni PAINT Permanent Paint Marker. These oil-based paint markers render clear and bold lines on both light and dark surfaces, including metal, glass, wood, rubber, concrete, and plastic. Each permanent marker delivers bold and clearly visible lines using quick-drying paint that is resistant to extreme weather, water, fading, heat, and abrasions. The valve action control allows for smooth-flowing paint with excellent color coverage, while also preventing the marker from drying out if left uncapped. Designed with a metal barrel and durable tip for a long marking life, these paint pens are ideal for drawing on and marking outdoor projects involving manufacturing, construction, aviation, and other heavy equipment.