Superior performance, design and quality. Built to last. Our measuring wheels "Measure Guide(R)" enable you to measure by yourself. You measure when you want to, at great savings in labor costs and time. It's easy to measure curved , horizontal and vertical surfaces. All wheels are specifically calibrated to the counter. You measure from an upright position, no stooping or squatting, allowing operator to be aware of surroundings, traffic, etc. Easy to carry from job to job. Carrying it everywhere! So quick and easy to use , just set the counter to zero and start walking, as long as you are walking, you are measuring. The sturdy telescoping handle adjusts to fit the individual. To reset at any time simply push the subtracts in reverse. Especially suited to long indoor runs such as plant floor plans or outdoor measuring on firm surface.