【Accuracy Mechanical Measurement】:Gear driven mechanical dial, the dial has a dustproof protective cover. The Measuring Wheel uses mechanical gears, which increases when moving forward and decreases when moving backward. The effective distance measurement is 9999.99m. 【Easy to Use】: The Mechanical Distance Measuring Wheel does not require additional power supply and is environmentally friendly and efficient. It is designed with a reset button, and the data is clear and visible. The vertical positioning pointer accurately marks the starting point, which is very convenient to use. 【Lightweight & Portable】: The measuring wheel is foldable, and the lock folding is more stable. You only need to fold the measuring wheel for quick and compact storage, which is convenient to carry. 【Material】The measuring wheel is made of quality composite materials, which is solid, and has stable performance. 【Wide Application】: The multipurpose measuring wheel tool is suitable for indoor and outdoor projects, stadium measurement, construction measurement, engineering construction measurement, farmland construction measurement, etc. It is an essential tool for contractors, agriculturists, surveyors and landscape designers. Size Chart:Folded length  53cm/20.87inch, Extended length 102cm/40.16inch ,Wheel diameter  32cm/12.60inch, Wheel thickness 10mm/0.39inch Package Includes: 1 Measuring Wheel Note: Please allow slightly errors 1-2cm differences due to manual measurement.