Mitutoyo 368-991 368 Series Holtest Three-Point Bore Gauge Inside Micrometer Set Metric

Standard type supplied in a set complete with setting ring
The Holtest provides highly accurate three-point measurement of bore diameters
Measuring pins are spaced at 120° for increased accuracy of measurement compared to traditional two-point methods
By turning the ratchet the Holtest automaticall centres in the bore, which makes measurement fast and easy to perform without loss of precision
12-20mm measuring range. Length of extension 150mm. Setting ring Ø16mm