Artline Professional Series [EKPR-BDM] 2.3mm Bullet Tip Builders Markers are ideal for use on wood, sandstone, styrene foam, and other rough surfaces. A thick opaque paint ink ensures markings can be seen from a distance and wont fade over time. Our Professional series markers are designed to take the guesswork out of identifying the best marker for each job. Superior ink coupled with long-lasting barrels ensures the professional series will stand the test of time, no matter what the situation. The range of the Professional Series includes a General Purpose Marker, Exterior Marker, Builders Marker, Concrete Marker, Gardeners Marker, Plumbers Marker, and Electricians Marker. Whether you're a professional out in the field or a DIYer in your own home, the Artline Professional Series has a marker ideal for any job!