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 91164 3/8" W x 13" L 120 Grit A/O DynaCut Belt, 50/pack
3M 91004, E-A-R, Soft Yellow Neons One Touch Refill Earplugs 391-1004, Uncorded, Regular Size, 2000 Pair/Case, 7000002305
3M 11412, Roloc Disc 361F, 36 YF-weight, TR, 1 in, Die R100N, 7000045092
3M 26022, PPS Series 2.0 Adapter, Type S12, 10 mm Male, 1.0 mm Thread, 7100135943
3M 26583, Accuspray Refill Pack for PPS Series 2.0, Green, 1.3 mm, 7100152953
3M 27712, Cubitron II Roloc Durable Edge Disc 984F, 60+, YF-weight, TSM, Maroon, 1-1/2 in, Die RS150SM, 7000119218, 200 per case
3M 20942, Scotch-Weld Urethane Adhesive 3549, Brown, Part A, 5 Gallon Drum, (Pail), 7100041738
3M 07053, General Purpose Sanding Sponge CP040-12-CC, Single Angle, 2-7/8 in x 4-7/8 in x 1 in, Fine, 7100101245 