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 76625, Roloc Disc 777F, 80 YF-weight, TR, 1 in, Die R100N, 7000045621
3M 11414, Roloc Disc 361F, P120 XF-weight, TR, 1 in, Die R100N, 7000045104
Insize 6143, DEPTH STOP FOR CALIPERS, 6928640371301
3M 01875, Charge-Collection Solar Tape 3011, 2 mm x 1200 m, 7010312686
Dynabrade 52747 Shroud, 7", Vacuum, for 1.3 hp
Dynabrade 78591 3/8" Dia. x 1" W x 1/8" Center Hole, 80 Grit, 100/pack
3M 87053, Cubitron II Stikit Film Disc 775L, 150+, 6 in x NH, Linered w/Tab, Die 600Z, 7100075207, 250 per case
3M 14197, Roloc Disc Pad TP, Medium 2 in 1/4-20 Internal, 7000119311
Dynabrade 91428 1/2" W x 12" L 60 Grit A/O DynaCut Belt, 50/pack
3M 81283, Scotch-Weld High Strength Retaining Compound RT38, Green, 50 mL Bottle, 7010310185, 10/case 