Dynabrade 13509 Dynastraight Finishing Tool, Rear Exhaust, 6,000 RPM, 5/8" (16 mm) or 1" (25 mm) Dia. Arbor 
Insize 4799-1200, PROTRACTOR, 7.9×11.8″ 0-180?, 6928640317422
$68.54
Graduation 1?
Made of stainless steel
Satin chrome plated scale.
With clamping screw.
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