The IDG-1 Internal Diameter Gauge is a precision tool designed to verify whether the internal diameter of a sample falls within a specified range. It ensures that the sample meets the required standards by providing a quick and accurate check.

This unit works by using two ends of the gauge: the smaller end should fit into the internal circle of the sample, confirming the minimum diameter, while the larger end should not fit, ensuring the maximum diameter is not exceeded.

The gauge is custom-made to specific diameter ranges, which customers must specify when placing an order.