Center Gauge

a center gauge is a measuring tool used in metalworking and woodworking to determine the angle of the points on a lathe or other tools.

A center gauge being used to verify the angle of a threading tool.

Center gauges can also be used to measure the angles of other tools and components, such as the angles of threads on screws or bolts. Some center gauges even have multiple notches for measuring different types of angles, making them a versatile tool for a variety of applications.