Review on 📐 Precision Machinist Graduation Micrometer - Professional Grade by Kenny Sarma

I bought this set a year ago and have used the 1" and 3" microns several times with moderate success. Today I tried to set up a vernier caliper using a 4 inch micrometer to measure a pair of motorcycle cylinders. The cylinders didn't really look overly worn, so I went back to the mic and checked the calipers. came with a micrometer. 3" measured 3.0000 and 4" measured 3.9999. I adjusted the gauge to a micron and rechecked the measurements and again found the cylinders were worn beyond their operating limits. In an act of frustration and desperation, I took out a vernier caliper and checked the micrometer. The micrometer was set at 3.701 and the caliper was almost 0.005! I have tested this with 3 different calipers including Mitutoyo. I remeasured the expected light wear and found that the cylinders were within their lifespan and could be reused. If I hadn't questioned the measurement I would be wasting over $1200 worth of parts and replacing, not to mention the hour I wasted trying to confirm its being the original measurement. I would not recommend these micrometers to anyone.