These Stanley Fatmax Fine Tip permanent Black Markers are ideal to mark out in all-weather, environmental conditions. They have a strong durable tip which reduces wear and tear even when used on abrasive surfaces. They are both water and oil resistant. The Bi-material hand grip provides ease of use in all weather conditions as well as when wearing gloves. They can be used to mark concrete foundations as well as copper roofing material, gas pipe, black pipe, wood, metal, marking tools and equipment. They can be used to colour nuts and bolts needing to be black. Specification: Colour: Black. Pack Quantity: 2.