Ideal for engineers, surveyors, and contractors. Precision totalizer automatically records up to 100,000 feet. Wide Neoprene tire provides positive traction and extra long wear. Automatic brake prevents accidental backtracking to ensure accuracy. Built-in stand keeps wheel in upright position. Spokes set at 2¼" for estimating measurements less than 1 foot. Safety-Glo powder-coat finish. Wheel circumference 4 feet. Wheel diameter 15½". Weighs 8 lbs. Five-year warranty.