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 1121-200B, DIGITAL INSIDE POINT CALIPER, 60-200mm/2.36-8", type B, 6928640375668
3M 91004, Drywall Sanding Sponge CP-042-4PK, Single Angle, 4-7/8 in x 2-7/8 in x 1 in, Fine, 7100111452, 4/pack
Dynabrade 97566 1/4" Safety Coupler, Female
Dynabrade 98265 3/8" Female Coupler with 3/8" Male Plug Assembly
Dynabrade 98271 1/2" NPT Male Plug
3M 27468, EMI Copper Foil Shielding Tape 1181, 1 in x 18 yd (25,40 mm x 16,5 m), 7000132169
Standard Abrasives 702559, A/O Half Taper Cartridge Roll, 1 in x 2 in x 3/16 in, 60, 7100102895
Dynabrade 94960 1/4" Composite-Style Coupler, 1/4" Female
3M 07053, General Purpose Sanding Sponge CP040-12-CC, Single Angle, 2-7/8 in x 4-7/8 in x 1 in, Fine, 7100101245 