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 96102 [1-1/2" Thread - 1-1/4" Non-Thread], Non-Conductive Vacuum Hose Cuff (Includes 95895 Insert)
Standard Abrasives 726004, A/O C4 Straight Precision Cartridge Roll, 1 in x 2-1/2 in x 1/4 in 80, 7100098780
3M 55564, Performance Flatback Tape 2525, Orange, 36 mm x 55 m, 9.5 mil, 24Rolls/Case, 7000088507
3M 64465 Scotch-Brite Durable Flex Belt, 1/4 in x 24 in, A FIN, 7000121133
Standard Abrasives 710580, A/O Full Taper Cartridge Roll, 3/4 in x 1-1/2 in x 1/8 in 80, 7100093004 