Welcome To The stoe LINE WOOD - The chain is a unit of length equal to 30 meter . It is subdivided into links. There are 5 chains in a furlong, and 40 chains in one statute mile. In metric terms, it is 10 m long. By extension, chain-age (running distance) is the distance along a curved or straight survey line from a fixed commencing point, as given by an odometer. This Ground Measuring Chain Easy To Carry And Easy To use. For All Engineers, Students, & Patwari.Bolt and Fly nut of Base Plate.Brass ring at every one meter & Supreme strength with best quality long time use.