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 77767 5" Dia. x 7/8" Center Holes, 40 Grit, Z/A, Type 27, DynaCut Flap Disc w/Fiberglass, 10/pack
Insize 6302, MICROMETER STAND, 6928640392467
3M 05034, Cloth Belt 384F, 60+ XF-weight, 1/2 in x 24 in, Fabri-lok, Full-flex, 7100141441, 200 per case
3M 76540, Cloth Belt 461F, P60 YF-weight, 57 in x 126 in, Film-lok, Full-flex, 7100218673, 40 per case
3M 05010, Cloth Belt 384F, 120+ XF-weight, 1/4 in x 24 in, Fabri-lok, 7100141428, 200 per case
3M 37024, Extra Large Drywall Sanding Sponge 910-DDA, Dual Angle, 2-1/2 in x 8 in x 1 in, Fine, 7010375249
3M 20910, PSA Cloth Disc 348D, 60 X-weight, 2 in x NH, Die 200P, 7000118872
3M 26138, PPS Series 2.0 Adapter, Type S42, 3/8 Female R-Angle, 19Thread BSP, 7100135930 