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?).

Insize 0020-A199, VIBRATION PEN (THREE PARAMETERS), 6974029777059
3M 97979, Hi-Strength 94 ET Cylinder Spray Adhesive, Clear, Large Cylinder (Net Wt 26.2 lb), 7000144615
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 