3M 463-000-TRI-4, Pro Grade Precision Comfort & Performance Large Sanding Tool, 3.7 in x 7 in, 7010416697 
Insize 6145-500, ACCESSORY SET FOR LARGE DIGITAL CALIPER, 6940561975093
$233.95
Suitable for 0-20″/0-500mm and 0-24″/0-600mm digital calipers (thickness of lower jaws?.220?)
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