3M 5680, Disc Pad Holder, 3M 915, 5 in x 1/8 in x 3/8 in 5/8-11 Internal, 7000120889 
Insize 7126-12, RIGID RULE12″, 6928640385193
$4.61
Graduation 1/64″ and 1/32″ on front face, 1/16″ and 1/8″ on back face
4R graduation.
Made of stainless steel.
Non-glare surface
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