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 8911-200GF1, WEIGHT _200g, 6940561906547
Dynabrade 15336 Rubber Drive Wheel
Dynabrade 96412 [1-1/4" Thread - 1-1/4" Thread], Non-Conductive Vacuum Hose Cuff
3M 93949, General Purpose Sanding Sponge CP040-3PK, Single Angle, 2-7/8 in x 4-7/8 in x 1 in, Fine, 7100175194, 3/pack 