3M 28713 ROLOC DISC PAD TR, HARD 4 IN 5/8-11 INTERNAL, 7010298961 
Standard Abrasives 269201, Cross Buff Mandrel, 4 in x 1/4 in Shank x 1/4"-20F, 7010368742 
Insize 4905-B500, FRAME LEVEL, 20″, 6928640378829
$1,469.97
Sensitivity .0012in/ft (=0.0057?)
No need to set zero before use
V-groove on bottom for shafts(shafts diameter .76~4.56″)
With longitudinal vial
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