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 37024, Extra Large Drywall Sanding Sponge 910-DDA, Dual Angle, 2-1/2 in x 8 in x 1 in, Fine, 7010375249
Dynabrade 15101 Tension Arm (for Mini Dynafile II)
Insize 4120-6N, METRIC THREAD RING GAGE, NO GO, M6x1, 6928640341724
Dynabrade 01480 Vane Set (4pk)
Dynabrade 10690 Filter/Regulator/Lubricator, FRL40, 1/2" NPTAssy.
Air Turbine Tools 2590SVR - 6mm Angle Hand Tool Series (Long Version, Rear Exhaust), 30,000RPM, 35831
3M 34425, General Purpose Sanding Sponge CP041-3PK, Single Angle, 2-7/8 in x 4-7/8 in x 1 in, Medium, 7100175218, 3/pack 