3M 65489, Pro Grade Precision Ultra Durable Universal Hole Sanding Disc, DUH5120TRI-10T, 5 IN x UH, 120, 7100202877, 10 per pack 
Insize 4790-2500, 90? BEVELED EDGE SQUARE, 9.8×6.5″, grade 0, 6928640317699
$205.47
Satin chrome plating.
Beveled edges for inside and outside measurement.
Made of hardened stainless steel.
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