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 45026, Diamond Grade DG3 Reflective Digital Sheeting 4084UDS, Fluorescent Orange, 30 in x 50 yd, 1 Roll/Case, 7100282400
ACS CX1250 Diamond Belt, 1/2" X 24" 30u
3M 05027, Cloth Belt 384F, 240+ XF-weight, 1/2 in x 12 in, Fabri-lok, 7100141448, 200 per case
Dynabrade 94980 1/4" Composite-Style Coupler, 1/4" Male
3M™ 72122, Portable Compressed Air Filter and Regulator Panel 256-02-01, 100 cfm, 8 outlets, with Carbon Monoxide Monitor, 7000052147, 1 EA/Case
Standard Abrasives 840138,Quick Change Surface Conditioning GP Disc, Medium, TSM, 1 in, 7000121649, 50 per case
Dynabrade 78425 4-1/2" Dia. x 3/8" Coarse DynaBrite Surface Conditioning Disc, 25/pack
Dynabrade 40610 Electric Dynafile II Abrasive Belt Tool
3M 26017, PPS Series 2.0 Adapter, Type S10, 1/4 Female, R-Angle 19
Thread BSP for Side Cup Mount, 7100135927 