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 90370 3/4" W x 34" L 120 Grit A/O DynaCut Belt, 50/pack
Insize ISM-M2000, METALLURGICAL MICROSCOPE, 6928640348976
Dynabrade 11399 Type 27 Wheel Mounting Adapter Kit 