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 03647, Scotch-Brite Edger Disc Pad, 7 in x .875 in, 7000133920
3M 45014, Diamond Grade DG3 Reflective Digital Sheeting 4090UDS, White, 30 in x 50 yd, 1 Roll/Case, 7100282804
3M 26583, Accuspray Refill Pack for PPS Series 2.0, Green, 1.3 mm, 7100152953
Dynabrade 95676 1/4" Female Coupler with 1/4" Male Plug Assembly
3M 7100231080, Cloth Belt 340D, 80 X-weight, 4 in x 21-3/4 in, Film-lok, Single-flex, 50 per case
Dynabrade 94960 1/4" Composite-Style Coupler, 1/4" Female
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 