3M 77737, ROLOC DISC PAD TS AND TSM, EXTRA HARD, 3 IN 1/4-20 INTERNAL, 7010299209 
Insize 6208-80E, UNIVERSAL MAGNETIC STAND, 6928640329784
$72.44
For electronic/dial indicators and dial test indicators.
Magnetic Force: 176lbf
Applicable Holding Stem: 3/8″ DIA
With fine adjustment and dovetail groove
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