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 77768 5" Dia. x 7/8" Center Holes, 60 Grit, Z/A, Type 27, DynaCut Flap Disc w/Fiberglass, 10/pack
3M 64316, Cubitron II Depressed Center Grinding Wheel, T27, 9 in x 1/4 in x 7/8 in, 7100094063, 20 per case
3M 26118, PPS Series 2.0 Adapter, Type S26, 11 mm Male, 1.0 mm Thread, 7100135924
3M 77579, Cubitron ll Cloth Belt 784F, 36+ YF-weight, 1/2 in x 24 in, Fabri-lok 45 Angle, Single-flex, 7100232690, 200 per case 
