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 88899, PSA Cloth Disc 348D, P180 X-weight, 12 in x NH, Die 1200B, 7010360719
3M 87449 Silver Depressed Center Grinding Wheel, T27 Quick Change, 9 in x 1/4 in x 5/8-11 Center Hub Thread, 7010409732, 20 per case
Standard Abrasives 827520, Industrial Scouring Hand Pad, 6 in x 9 in, 7000046756, 60 pads per case
Norton 66261127733 - 2" X 50 Yard 60 Grit Metalite™ Aluminum Oxide Cloth Roll, 1 Each
ACS Diamond Cloth Belt, CX1250 1/4" X 24" 75U
Dynabrade 91425 1/4" W x 12" L 60 Grit A/O DynaCut Belt, 50/pack
3M 26118, PPS Series 2.0 Adapter, Type S26, 11 mm Male, 1.0 mm Thread, 7100135924 