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 26115, PPS Series 2.0 Cup, Mini (6.8 fl oz, 200 mL), 7100284626, 4 Cartons/Case
Dynabrade 91162 3/8" W x 13" L 60 Grit A/O DynaCut Belt, 50/pack
Dynabrade 54040 5/8"-11 Female, 5/16"-24 Female, 1-5/8" Length
3M 55887, Rugged Comfort 6582 / 55887 Quick Latch Head Harness Assembly, System Component, 7000128252, 20 EA/Case
3M 19770, Utility Cloth Sheet 314D, 9 in x 11 in P120 J-weight, 7000000358 