IMPORTANT SAFETY INSTRUCTIONS

Before work, remove burrs from the pipe cut surface. If deburring is insufficient, inadequate processing may result. Remove burrs completely.
Tighten the gauge securely using the shaft included with the tool. If tightening is insufficient, the desired work surface may not be obtained.
Make sure that the gauge securely fits in the groove of the body yoke. If the gauge does not completely fit in the groove, it may come off during work.