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?).

Insize MLP-GP270-U, GRINDER AND POLISHER, 6940561981698
3M 76625, Roloc Disc 777F, 80 YF-weight, TR, 1 in, Die R100N, 7000045621
3M 5681, Disc Pad Holder 915, 5 in x 1/8 in x 3/8 in M14-2.0 Internal, 7000028500 