Wrench is needed to install pins.
Clamping bushes (.008-.281″) are made of brass, clamping bushes (.281-1.010″) are made of aluminum.
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Insize 4209-2, LONG HANDLE TELESCOPING GAGE, 1/2 ~ 3/4″, 6928640311543
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Insize 4209-4, LONG HANDLE TELESCOPING GAGE, 1-1/4 ~ 2-1/8", 6928640311567 