4" Measuring Wheel, Suitable for measuring vertical and horizontal surfaces, the Crescent Lufkin Compact SAE Measuring Wheel displays surface dimensions in feet and inches for quick, accurate distance calculations. It features a 4-inch wheel with a rubber tire for superb traction on jobsites, baseball fields, carpeting or driveways. The analog counter dial calibrated to the wheel counts to 10,000 ft. before rolling over to 0.