3M 45179, Roloc Disc Pad TR, Medium 4 in 1/4-20 Internal, 7000045281 
Insize 6801-1202, MAGNETIC V-BLOCK, 3.9×2.8×3.7″, 6928640320637
$240.88
Hold cylindrical workpieces for inspection and machining.
Supplied in single piece.
Not hardened.
V groove on the top for large shafts.
V groove on the bottom for small shafts.
Not suitable for steel or iron surface.
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