Ideal for checking hole size, location, gage slots, distance between holes, go or no-go gaging, and/or setting other gages and micrometers. Class ZZ. Overall length: 2". Each gage is marked with size and tolerance (+) or (-). Sizes marked on case for easy identification. Fully hardened to 60-62 RC. Each gage is inspected and has a 10 Micron finish or better. Complete with plastic, element-proof fitted case.