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Modified frame (see photos)
With a ratchet stop for constant force
birth defects or other reproductive harm
ØD: 235mm
Differential movements of spindle threads and units allow fine spindle feeding (0
Mitutoyo 368-919 Holtest Complete Unit Set, 2-4" Range, .0002" Graduation Protractor Modified frame (see photos)Item Description Range: 2 2. 5", 2. 5 3", 3 3. 5", 3. 5 4" Graduation: . 0002" Accuracy: . 00015" Setting rings 2. 5" & 3. 5" dia. With extension rod These Holtests are versatile, self centering three point internal micrometers for the accurate and efficient direct measurement of internal diameters. Three anvils, evenly spaced at 120 apart, contact the internal wall surfaces and find true alignment with the axis of the bore for accurate ID measurement