Distance Measuring Wheels are excellent tools for measuring long distances in a hurry. Some people call distance measuring wheels "footage wheels" or "distance calculation wheels". They are great for estimating paving jobs, building lot sizes, carpet estimates, grass seed and fertilizer calculations, insurance calculations, fence estimating, utility contracting, and other uses when a large distance measurement is needed quickly. To use, simply reset the counter, place the wheel at the point you want to start measuring, and roll in a straight direction to the stopping point, then read the counter. Hence, the reason they are called a "Rolling Tape Measure".