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 94856 5' Max Flow 10mm I.D. Air Hose Assembly, Male (1/4") / Male (1/4") Fitting Ends Included
Insize VSP-201D, FOUR DIRECTION CABLE(FRONT VIEW), cable length 120", 6940561941302
3M 13627, 947, Hookit Disc Pad Holder, 7 in x 1 in x 5/8 in 5/8-11 Internal, 7000028353
3M 16584, Accuspray Atomizing Head, Orange, 1.4 mm, 7100078992 