Measure radius of external arc, arc angle of measured surface should be larger than 90?
Resolution .0005″/0.01mm
Buttons: on/off, set, inch/mm, preset (+, -)
Automatic power off, move the digital unit to turn on power
Battery CR2032, Data outputMade of stainless steel
Supplied with pin gage for zero setting

Standard Abrasives 701100, A/O Tapered Cone Point, D-40 120, 7010310892, 100 per case
Insize 4808, WIRE GAGE, 0-36(.3249~.0050"), 6928640330155
3M 95725, Venture Tape Metal Building Facing Tape 1552CW, White, 72 mm x 45.7 m, 7010313505 