คุณลักษณะ

• Turn the knob counterclockwise to retract the spindle.
• Replace the spindle according to the depth to be measured.
• [Replacing the spindle] 1. First, tighten the lock nut.　2.Rotate the knob counterclockwise. The knob part will come off.　3.Pull out the spindle and insert the selected spindle.　4.Replace the knob and tighten.　5.Loosen the lock nut and check with the existing reference material.
• [Measurement] Insert the spindle into the hole, etc., and place the frame tightly on the top surface of the target hole.　Rotate the thimble to move the spindle until the bottom of the hole is at the bottom of the side.