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 80131, Flexible Diamond Hand File Set 6210J, M74 Mic, 7000082153, 5/Carton
Dynabrade 94990 1/4" Female Composite-Style Coupler with 1/4" Male Plug Assembly
Dynabrade 52747 Shroud, 7", Vacuum, for 1.3 hp
Insize 4808, WIRE GAGE, 0-36(.3249~.0050"), 6928640330155
Dynabrade 78592 3/8" Dia. x 1" W x 1/8" Center Hole, 120 Grit, 100/pack
3M 05043, Cloth Belt 384F, 80+ XF-weight, 1/2 in x 12 in, Fabri-lok, Full-flex, 7100141435, 200 per case
3M 26022, PPS Series 2.0 Adapter, Type S12, 10 mm Male, 1.0 mm Thread, 7100135943
Standard Abrasives 875701, HS Mini-Brush, 4-1/2 in x 4 in x 5/8-11 FB024 35-74 A MED Medium Density, 7100082651
3M 88769, FLAP DISC HOLDER T27, 4 IN 5/8-11 INTERNAL, 7010364084
Dynabrade 97566 1/4" Safety Coupler, Female
Air Turbine Tools 201SV - 3mm Straight Hand Tool Series with Brake, 90,000 RPM, 32175
3M 01875, Charge-Collection Solar Tape 3011, 2 mm x 1200 m, 7010312686
3M 26110, PPS Series 2.0 Adapter, Type S24, 1/4 Female, R-Angle 18
Thread NPS, Side Cup Mount, 7100135940 