Multifunction Digital Indicator(Digital Radius Gauges)__Roktools
4" digital caliper
Amazon.com: MXBAOHENG High Accuracy Digital Radius Gauge Digital Radius Indicator Measurement Tool with Five Measuring Jaws : Industrial & Scientific
Amazon.com: CGOLDENWALL High accuracy digital radius gauge Electronic Inside and Outside Radius Gage with 10mm /20mm /30mm /60mm/100mm changeable measuring jaw Black 0.2" - 27.5"/5 mm - 700 mm : Industrial & Scientific
Digital Display Chamfer Caliper C Plane R Plane Chamfer Gauge Arc Radius Electronic Vernier Caliper CR1525 - AliExpress
China Factory Customization Supper Large Digital Indicator Diameter Radius Gauge with Jaws 100mm 200mm 300mm 400mm - China Digital Radius Gauge, Radius Gauge | Made-in-China.com