Review on Advanced Small Precision Gauge for HFS Full Ball by Brian Rivenbark

Works well in my home shop. Yes, these are cheap Chinese instruments and they are very rough. I unscrewed the shaft, washed the two parts with petroleum and lubricated a little with machine oil. It only took 20 minutes and now my $23 sensors feel as smooth as the $150 brand names I use at work. hp Pay attention to the price because Amazon sellers are all over the place with price. Some sellers had them for $70 + $4.50 freight (all in the same blue packaging with white lettering).