Nothing measures the "back 40" better than the MM-6.6. Built of strong tubular steel to measure acreage, the MM-6.6 also handles row measurements and trenching applications. With a 6-foot, 6-tenths of a foot circumference, this wheel really eats up the distance. And its silver powder coat steel wheel makes it go the distance in style. Accuracy and reliability... the MM-6.6Measures up to 10,000 increments in 6 feet and 6 tenths of a foot with a molded polycarbonate 5-digit counter6 and 6-tenths of a foot wheel circumference with a 25" wheel diameter and an insert-and-lock handleFeatures a steel wheel surface for easy rolling