Starrett End Measuring Rod with Insulated Handle and Spherical Ends for Comparing Gages and Measuring Parallel Surfaces 1 4" Diameter, 3" Length 234A 3 1 4" Diameter; 3" Length Size:1 4" Diameter; 3" Length Use Safety Door Guard Made sold2025 Use Safety Door Guard Made of Soft Foam to Keep Door Open you can be sure you are keeping an accurate record of all your monetary transactions The Starrett End Measuring Rods or Standards are for checking and setting micrometers of 2" capacity or larger and are also used on machine tools for comparing gages and checking precision measuring tools They are useful for measuring parallel surfaces and many other types of work