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 95529 O-Ring
Dynabrade 25234 Vane Set (4pk)
Dynabrade 90549 1/2" W x 44" L 120 Grit A/O DynaCut Belt, 50/pack
Dynabrade 78055 1" W x 24" L Medium NWN DynaBrite Belt, 10/pack
Air Turbine Tools 310RDM - 1/4" Router Hand Tool Series, 25,000RPM, 33422
3M 14197, Roloc Disc Pad TP, Medium 2 in 1/4-20 Internal, 7000119311
Dynabrade 98265 3/8" Female Coupler with 3/8" Male Plug Assembly
3M 93949, General Purpose Sanding Sponge CP040-3PK, Single Angle, 2-7/8 in x 4-7/8 in x 1 in, Fine, 7100175194, 3/pack 