3M 28473, Roloc D/F Cool Running Disc Pad TR, 4 in x 5/8-11 Internal, FIN, 7000144107 
Insize 6898-100, MAGNETIC RECTANGULAR BLOCKS, 3.9×2.8×2.8″, pair, 6928640320958
$867.34
For grinding, light milling, drilling and inspection of round and square jobs.
Hardened, high accuracy, strong magnetic force.
Working surfaces are hardened to HRC58-62.
Magnetic force on top, bottom and back sides.
Supplied in matched pair.
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