Accuracy: ?2″.
To inspect protractor, taper gage, index plate, index head and goniometer, can also be used to set angle.
Made of special alloy steel, hardness HRC64, high stability, wear resistance and easy combination.
Can be combined to any angle with interval 6 seconds after combination (6″, 12″, 18″, … , 360?).

Dynabrade 07107 Vane Set (5pk)
Dynabrade 91315 11-1/4" Dia. x 36 Grit A/O Non-Vacuum Hook-Face DynaCut Disc, 10/Box
Insize 4168-21E, STEEL STANDARD BALLS, 23/32", 6940561981599
Air Turbine Tools 2590SVF - 1/4" Angle Hand Tool Series (Long Version, Front Exhaust), 40,000RPM, 35842
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Dynabrade 11399 Type 27 Wheel Mounting Adapter Kit
Dynabrade 55242 Vane Set (4pk) 