Theodolite Survey Drawing Silver is a precision instrument which is mainly used in surveying to measure angles in horizontal and vertical planes. It is an optical device which is made from highly precise components that are designed with respect to various standards to provide accurate results. Theodolite survey drawing silver is required to obtain relative direction to point of details. The lens used is made from best grade of optical material to provide a clear vision. It is used in various applications such as triangulation in road building, tunnel alignment, and other civil-engineering work. The external body is rigid and robust in construction to support various other components.