Well, the half round thumb thing is a fake wheel - it can't rotate. Millimeters are easy to read, inches are less easy. The knurled knob to hold a reading works. The marks are engraved and accurate - the vernier reading scales came adjusted correctly. The jaw faces meet neatly with no light showing through. The only moving parts are the slide and the set screw. The fake fine adjustment wheel is also on the $85 Starrett https://www.amazon.com/Starrett-125MEA-6-150-Stainless-Resolution/dp/B000VDZEAC/ref=sr_1_1?ie=UTF8&qid=1541450139&sr=8-1 which is a "nicer" (also made in China) vernier caliper.
🔧 UEi Test Instruments DAFM3B Digital Multimeter
6 Review
Portable Handheld Manometer 📏 for Accurate Pressure Differential Measurement
5 Review
🌬️ Advanced 3-in-1 Indoor Air Quality Monitor with CO2/RH/Temp Data Logging and Audible Alarm - NDIR Sensor Technology
8 Review
🔍 Dioxide Controller for Digital Gas Monitoring
5 Review