[Features]● All cylindrical workpieces can be measured directly on the machine tool or in the measuring chamber. ●Uses a heat-insulated handle to prevent heat transfer from the operator's hand. ● Rigid frame opens on one side with a convenient insulated handle to eliminate heat transfer from the user's hands. ●Both spindles are made of hardened stainless steel and are mounted and held in long guideways. ●The tip of the carbide measuring surface is slightly chamfered for easy positioning. ●The movement of the maximum precision spindle is transmitted to the indicator as it is. ●Built-in spring eliminates user interference and achieves stable measuring force.