Review on 📏 HHIP 4101 0012 M2 Gage 0 251 - High-Quality Measurement Tool for Precise Machining by Matt Vanlaere

Some of the pens I used from the set fit perfectly. They were all exactly 0.0002 minus the specified magnitude. The finish on the OD (OD) is great. The only thing I noticed is that the ends are rough. It's like they just got cut. But that's just cosmetic. It's good where it counts.