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 60102 Compression Spring
Dynabrade 78474 2-1/2" Dia. x 3/4", 8-32 Female Center Thread, A/O, 80 Grit, 8-Ply J-DynaCut Cross Pad, 100/pack
Dynabrade 94793 2" W x 72" L 120 Grit A/Z DynaCut Belt, 10/pack
Dynabrade 15310 Guard
Dynabrade 01470 Exhaust Insert Assembly
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 