Zozen Green Measuring WheelOne key reset, Larger bracket, Redesigned joints, Threaded TPR tires, Increased friction, Original location marker, Exquisite Zozen backpack. The handle features a large for more comfort. Portable AccurateThrough 2 tims folds can be folded to 16 inches into a backpackincluded for easy carrying and transport. Unfolded it extends to 40 inches. Adopts a precise gear structure design with an accuracy of0.5. the forward count increases, and the backward count decreases, effectively avoiding errors. 9999.11 Maximum CapacityU.S. Measuring units, Measures in feet and inches. Measure distance wheel against a usual tape measure and it will be the same measurements. Whether private or industrial purposes, the measurement of straight line and curve line is easy. Who Uses ItThe surveying wheel is great for indoor, outdoor projects, also ideal for real estate appraisers, law enforcement, construction workers landscaping workers and homeowners to measure your boundary lines of your property. Versatile enough to use on a variety of indoor and outdoor projects, this tool is ideal for real estate appraisers, law enforcement, construction or landscaping workers and homeowners alike. Different EnvironmentsWith sturdy, durable rubber, walking roller wheel is equipped for all environments grass, concrete, gravel, dirt and more STURDY Walking wheels are great for professional work projects or school activities. Extremely accurate makes it extremely useful to measure the boundary lines of your property and neighborhood.