Review on 🔘 DGOL Round Stainless Steel Standard Thickness by Shawn Price

I really wanted to like this tool. It is made of durable stainless steel with very clear markings. The problem is that the accuracy is not very good. For example, I have a 0.007" feeler gauge that I measured to 0.0075" with a precision micrometer. This pin fits the DGOL's .0078 hole as it should, but not the .0085 hole. In other words, the .0085 slot is smaller than the .0078 slot! Some of this may be due to burrs in the grooves. I found that after running the probe through some of the slots, they loosened up a bit and were getting closer to the correct value. But that didn't happen in the example I gave above - the .0085 groove stayed tighter than the .0078 groove. I'm also not sure what "caliber numbers" mean. I know there are many different sizing standards, but the markings on the tool don't match any that I could find. For example, the "30 gauge" slot in the tool is marked with the decimal equivalent of 0.0125. AGW lists 30 gauge as 0.0100 inch. 30 gauge sheet steel is .0120 inch. The British SWG has a 30 gauge as 0.0124 inch. It's pretty close to 0.125, so maybe the tool is tagged in UK SWG? No, because in UK SWG 10 gauge is .128" but the tool is marked .140" AGW 10. Gauge 0.1019". Where did they get 0.140" = 10 gauge? The closest gauge I could find is "Washburn and Moen Gauge" with 10 gauge as .1350. I give up.