Drift diameter gauges are simple and general tool designed to
measure inside drift size of casing, tubing,drill pipe and other
pipes. In order to live up to the standard requested, it used to
inspect the inside drift size of a variety of tubings. The biggest
size will be known through inspecting after deformation. It is the
essential tool in the course of workover .
Drift Diameter Gauges are simple in structure, safe and reliable in
use, high-efficiency performance, convenience operation。