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 26018, PPS Series 2.0 Adapter, Type S11, 3/8 Male, 18 Thread NPS, 7100135942
3M 67016, E-A-R, Soft Grippers Probed Test Plugs 393-2021-50, 50 Pair/Case, 7010341317
3M 66865, Trizact Cloth Belt 237AA, A16 X-weight, 3-1/2 in x 15-1/2 in, Film-lok, Full-flex, 7000028335, 50 per case
3M 97419, Aluminum Foil Tape 3380, Silver, 48 mm x 45 m, 3.25 mil, 7000049613
Dynabrade 77759 4-1/2" Dia. x 7/8" Center Hole, 80 Grit, Z/A, Type 27, DynaCut Flap Disc W/Fiberglass, 10/pack
3M 03140, General Purpose Sanding Sponge CP041-6P, Single Angle, 2-7/8 in x 4-7/8 in x 1 in, Medium, 7100101537, 6/pack 