THE STARRETT NO 733 ELECTRONIC MICROMETER IS A PRECISION MEASURING INSTRUMENT DESIGNED FOR HIGH ACCURACY IN BOTH INCH AND METRIC DIMENSIONS. IT FEATURES A MEASUREMENT RANGE FROM 1 INCH TO 2 INCHES (25.4 MM TO 50.8 MM) WITH A RESOLUTION OF 0.00005 INCHES (0.001 MM) AND AN ACCURACY OF +/- 0.0001 INCHES. THE MICROMETER OPERATES DIGITALLY, PROVIDING EASE OF USE AND PRECISE READINGS. IT INCLUDES A FRICTION THIMBLE FOR CONSISTENT PRESSURE DURING MEASUREMENT, ENSURING RELIABLE RESULTS. THE SPINDLE DIAMETER IS 0.25 INCHES, CONTRIBUTING TO ITS ROBUST DESIGN. ALTHOUGH THE MICROMETER IS NOT COOLANT RESISTANT, IT IS HOUSED IN A PROTECTIVE CASE FOR SAFE STORAGE AND TRANSPORT. A BATTERY IS REQUIRED FOR OPERATION BUT IS NOT INCLUDED.