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 66261, Wind Protection Tape Edge Sealer W2600, 50 ml (1.7 fluid ounce), 7000049496, 12/Case
Insize 2307-1R, REVERSE READING DIAL INDICATOR, 1", lug back, 6928640396649
3M 13370, Scotch-Brite Star, 1-1/2 in A CRS LS, 7000120965
3M 33440, Cubitron II File Belt, 33440, 80+, 10 mm x 330 mm (3/8 in x 13 in), 7100033195, 10 belts per carton, 5 cartons per case
Dynabrade 96248 Repair Collar-1-3/8" Bore
3M 03126, General Purpose Sanding Sponge CP040-6P, Single Angle, 2-7/8 in x 4-7/8 in x 1 in, Fine, 7100101532, 6/pack
3M 64312, Scotch-Brite Cross Buff, 2 in x 1/2 in x 2 PLY x 8-32 High Strength A MED, 7000121121 