These road crayons provide a quick and simple road marking solution for surveyors, road maintenance workers and utilities engineers. They allow for visible marks, shapes, signs and lines to be made on a range of surfaces, including roads and pavements, as well as other asphalt, concrete and stone surfaces. Prosolve road marking crayons are hardwearing and waterproof - they can be used for highlighting potholes and divets for repair, identifying underground hazards prior to excavations, making basic signs, arrows and stencils, and much more. These non-toxic hard road crayons each measure 112mm x 19mm and they are sold in boxes of 12 crayons. They are available in a variety of different colours - white, yellow, red, blue, green and black. Simply use the drop down box above to select the colour you require.