Starrett 82MBZ Dial Bore Gauge Complete Set, 5.5 15.1 mm Range, 0.002 Graduation

Range is 5.5 to 15.1 mm, with maximum bore depth of 38 mm on probes up to 10.3 mm, and 44 mm on probes up to 15.1 mm, with indicator graduations of 0.002 mm Two-point contact measurement system for detecting hole geometry problems like taper, bell-mouth, and ovality Split-ball contact is self-centering Interchangeable probes are hard chrome-plated and polished, for precision and durability Set includes dial indicator, body, actuating rod, two adjusting wrenches, six probes, and protective case