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 96248 Repair Collar-1-3/8" Bore
Insize MLP-CM60-CUT2, CUTTING BLADE, 250_1.5_25.4mm, 6940561949094
3M 83760, High Performance Industrial Plastic Adhesive 4693, Light Amber, 1 Gallon Can, 7000046575, 4/case
3M 07054, General Purpose Sanding Sponge CP-041-ESF, Single Angle, 2-7/8 in x 4-7/8 in x 1 in, Medium, 7100101551 