Foldable Mechanical Distance Measuring WheelFeatures: Useful measuring wheel to measure distance with accurate and reliable result. Easy to use, just simply walking a straight line and it will record the distance automatically. With a reset knob for zero clearing and easy reading. Suitable for the precision measurement of roads, pavements or land. Sealed, gear driven transmission for durability, handy kickstand supports wheel. Folding structure design, convenient to carry. Specification: