This machine is light, flexible, and durable. It is the current domestic mechanical measuring wheel, with outstanding durability and accuracy. Mainly used in the surveying and mapping industry, real estate development evaluation, real estate surveying, road construction, communication and mobile, power cables, green gardens and sports venues construction, land surveying and mapping, stadium markings, farmland infrastructure, landscape greening and highway accident investigation. It is even used for step counting and so on. Is a long-distance instrument loved and used by more and more people. It is very convenient to carry when folded into the matching small bag.