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 07144, Inhalation Valve 6893/07144(AAD), System Component, 7000002049, 200 EA/Case
3M 82238, Scotch-Weld Epoxy Adhesive 420, Off-White, Part B, 5 Gallon Drum(Pail), 7100001145
Dynabrade 80459 HEPA 13 Vacuum Cartridge Filter
Dynabrade 15360 Dynafile III Abrasive Belt Machine for 24" Belts
Dynabrade 95544 Gear Grease, 2.5oz. Tube
3M 87670, High Intensity Prismatic Reflective Sheeting 3930DS White forDigital Printing, 24 in x 50 yd, 7100116165
Dynabrade 95848 Dynabrade Gear Oil
Dynabrade 79126 3/4" W x 18" L 60 Grit DynaCut Premium Ceramic Belt, 50/pack
3M 24338, Scotch-Brite EXL Deburring Wheel, XL-WL, 8A Medium, 16 in x 1 in x 10 in, 7100074355 