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 95745 1/4" NPT Speed Regulator
3M 27723, Cubitron II Roloc Durable Edge Disc 984F, 80+, YF-weight, TSM, Maroon, 4 in, Die RS400BBM, 7000119220, 100 per case
Insize 1535-100, DIGITAL OUTSIDE GROOVE CALIPER, 0-4"/0-100mm, 6940561961096
Dynabrade 97571 1/2" NPT Male Safety Coupler
3M 82596, Hot Melt Adhesive 3762 AE, Tan, 0.45 in x 12 in, 7100023019, 11 LBS/Case
3M 26138, PPS Series 2.0 Adapter, Type S42, 3/8 Female R-Angle, 19Thread BSP, 7100135930 