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 22394, Roloc Disc 361F, 50 YF-weight, TR, 3 in, Die R300V, 7000045096
Dynabrade 97567 1/4" Safety Coupler, Male
Dynabrade 94992 1/4" Male Composite-Style Coupler with 1/4" Male Plug Assembly
3M 82220, Hot Melt Adhesive 3747 AE, Tan, 0.45 in x 12 in, 7100020323, 11 LBS/Case
Dynabrade 95674 1/4" Female Coupler
3M 83491, Hot Melt Adhesive 3792LMPG, Clear, 1 in x 3 in, 7100020424, 22 lb/Case
3M 07054, General Purpose Sanding Sponge CP041-12-CC, Single Angle, 2-7/8 in x 4-7/8 in x 1 in, Medium, 7100101246 
