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 26120, PPS Series 2.0 Adapter, Type S28, 17.5 mm Female, 19 TPI
Thread, 7100135956
Dynabrade 78602 1/2" Dia. x 1" W x 1/8" Center Hole, 60 Grit, 100/pack
3M 19936, Neoprene High Performance Rubber and Gasket Adhesive 1300L, Yellow, 5 Gallon Pour Spout Drum (Pail), 7100022994
3M 05519, Sanding Block, Rubber, 2-3/4 in x 5 in, 7000000587
3M 45555, Cubitron ll Cloth Belt 784F, 60+ YF-weight, 3/4 in x 18 in, Fabri-lok, Single-flex, 7100119295, 200 per case
3M 28918, Spectacle Kit 7925/7925-AM, Accessory, 7000051853
3M 85492, Scotch Foil Tape 3311-10A, 2.0 in x 10 yd (50.8 mm x 9,1 m), 7010383663
3M 26172, PPS Series 2.0 6-Pack Starter Kit, Standard (22 fl oz, 650mL), 200 Micron Filter, 7100166584
3M 26022, PPS Series 2.0 Adapter, Type S12, 10 mm Male, 1.0 mm Thread, 7100135943
3M 01875, Charge-Collection Solar Tape 3011, 2 mm x 1200 m, 7010312686
Norton 66254414832 - 3" X 1/4" X 1/4" Vortex Rapid Blend Unified Wheel, 5am U2305, 40 Each
3M 01331, PSA Cloth Disc 348D, P100 X-weight, 3 in x NH, Die 300V, 7000118882
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 