/ Precision Measuring Tools / Precision Hand Tools / Micrometers / Inside Micrometers / 128M * Not actual product image 68117 128M Combination Head with Inside Micrometer 68117 Other similar products Millimeter-reading Combination Head with Setting Master. Features Specifications Contact Starrett Features Combines the precision of a dial indicator sensor and the linear accuracy of a micrometer Reduces the need for operator feel Provides faster readings with increased reliability Specifications Micrometer Type: Millimeter-reading Combination Head with Setting Master For 128M Accuracy (mm): Mic head +.005mm / -.00mm; Indicator is '+/- one grad per revolution