/ Precision Measuring Tools / Precision Hand Tools / Micrometers / Inside Micrometers / 128 * Not actual product image 64381 128 Combination Head with Inside Micrometer 64381 Other similar products Inch-reading Combination Head with Setting Master 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: Inch-reading Combination Head with Setting Master For 128 Accuracy (in): Mic head +.0002" / -.00"; Indicator is +/- one grad per revolution