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?).

3M 11414, Roloc Disc 361F, P120 XF-weight, TR, 1 in, Die R100N, 7000045104
Dynabrade 95842 Dynabrade Air Lube 10W/NR, 1 Pint
Dynabrade 61420 Raptor Vac Electric Portable Vacuum System
3M 22396, Roloc Disc 361F, 36 YF-weight, TR, 1-1/2 in, Die R150S, 7000045091
Insize 1120-150AE, DIGITAL INSIDE GROOVE CALIPER, 1-6"/25.4-150mm, 6928640326608
Dynabrade 77794 4-1/2" Dia. x 7/8" Center Hole, 80 Grit, Type 29, Ceramic DynaCut Flap Disc, 10/pack
Dynabrade 94980 1/4" Composite-Style Coupler, 1/4" Male
Dynabrade 53533 Cone or Plug Grinder (Triple Extension)
3M 26130, PPS Series 2.0 Adapter, Type S35, 16 mm Female, 1.5 mm
Thread Stretched, 7100135926 