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 01328, PSA Cloth Disc 348D, P180 X-weight, 3 in x NH, Die 300V, 7000045068
Insize 5022, 2-PIECE MEASURING TOOL SET, 6928640321290
Standard Abrasives 726004, A/O C4 Straight Precision Cartridge Roll, 1 in x 2-1/2 in x 1/4 in 80, 7100098780
Dynabrade 40610 Electric Dynafile II Abrasive Belt Tool
3M 28713 ROLOC DISC PAD TR, HARD 4 IN 5/8-11 INTERNAL, 7010298961
3M 20927, PSA Cloth Disc 348D, P240 X-weight, 1 in x NH, Die 100N, 7000118918
Dynabrade 14000 Dynafile Abrasive Belt Tool 