Check the listing for details. iGaging 6" Fastener-Cal Digital Caliper. Condition: New. Listed at 50.48 USD. iGaging 6" Fastener-Cal Digital Caliper, 188991, Accurate to within .001"/0.02 mm, Features fastener function for reading nut and bolt size, extra-large LCD screen and auto power off, Measures inside, outside, and depth, Measurement: 0–6"/150 mm range, Resolution: .0005"/0.01 mm/1/28", With a press of a button, the iGaging Fastener-Cal Digital Caliper quickly changes the readout between thousandths of an inch, fractions of an inch, and millimeters. The 1/32" option measures fasteners to quickly identify bolts, nuts, and hex key sizes. The four-way, extra-large display features a resolution of .0005"/.01 mm/1/128". Includes a hard case with foam lining, (2) CR 2032 3V batteries, and a battery removal tool. Features: Accurate to within .001"/0.02 mm Fastener.