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 40610 Electric Dynafile II Abrasive Belt Tool
3M 95728, Venture Tape Cryogenic Vapor Barrier Tape 1555CW, Silver, 48 mm x 45.7 m, 7000049897
Insize 5022, 2-PIECE MEASURING TOOL SET, 6928640321290
3M 07053, General Purpose Sanding Sponge CP040-12-CC, Single Angle, 2-7/8 in x 4-7/8 in x 1 in, Fine, 7100101245 