3M 65489, Pro Grade Precision Ultra Durable Universal Hole Sanding Disc DUH5120TRI-10I, 5 inch UH, 120, 7100202873, 10 per pack 
Insize 1136-501, ELECTRONIC CALIPER, 0-500mm/0-20″, 6928640301568
$591.80
Resolution: 0.01mm/0.0005″.
Button function: on/off, zero, mm/inch, ABS, data preset.
Battery CR2032
Made of stainless steel.
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