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 22407, Roloc Disc 361F, 80 YF-weight, TR, 1-1/2 in, Die R150S, 7000045099
Dynabrade 78290 2" Dia. x 2S Fine, Type R Unitized Locking-Type Disc, 25/pack
3M 55042, Cubitron II Cloth Belt 984F, 60+ YF-weight, 3-1/2 in x 15-1/2 in, Fabri-lok, Single-flex, 7000119512, 50 per case
Dynabrade 78380 3" Dia. x 1/2", Dyna Premium Rapid Strip TR Disc, 25/pack
3M 07056, Drywall Sanding Sponge CP-042, Single Angle, 2-7/8 in x 4-7/8 in x 1 in, Fine, 7100101555 
