It can inspect both pitch diameter and effective length of the threaded part of female screw thread of M2 to M18.

Since it can check two points measurement at the same time, it provides shorten measuring and production time at a reduced cost.

Standard type DSG and High spec type DSG-HS are available. DSG-HS is used for relatively deep holes and provides a precise readings.

To replace the gauge part to a different size or due to the wear occurred, a zero setting master and removing tool are available on sale.