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 74817, Cushion-Mount Plus Plate Mounting Tape E1320H, Yellow, 18 in x 25 yd, 20 mil, 7000047427
Standard Abrasives 713297, Aluminum Oxide Handy Roll, P120 J-weight, 2 in x 50 yd, 7100031623
3M 85372, Cloth Belt 777F, 80 YF-weight, 1/2 in x 12 in, Fabri-lok, Full-flex, 7000118397, 200 per case
3M 20889, PSA Cloth Disc 348D, 50 X-weight, 5 in x NH, Die 500X, 7010294666
3M 26053, PPS Series 2.0 Adapter, Type S14, 7/16 Male, 14 Thread UNC, 7100135932
3M 22408, Roloc Disc 361F, P100 YF-weight, TR, 1-1/2 in, Die R150S, 7000045101
Dynabrade 78579 1/4" Dia. x 1" W x 1/8" Center Hole, 60 Grit, 100/pack
3M 22407, Roloc Disc 361F, 80 YF-weight, TR, 1-1/2 in, Die R150S, 7000045099
Standard Abrasives 712149, Aluminum Oxide Handy Roll, P100 J-weight, 1-1/2 in x 50 yd, 7010295370
3M Scotchkote Liquid Epoxy Coating Spray System HSS Mix Nozzle, RightAngle, 7000058900 