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 54765, SandBlaster Right Angle Grinder Multi-Layer Disc 9679 60G 4-1/2 inch, 7010339877
Dynabrade 79691 8" 320 Grit, Extreme Orange Hook & Loop Disc w/8 Vac Holes, 25 per Box
3M 86992, Diamond Disc, 3" Roloc, 674W, 120 Mesh, TR, 7100143477, Box of 5
3M 94700, Cubitron ll Cloth Belt 947A, 60+ X-weight, 1/4 in x 24 in, Fabri-lok, Single-flex, 7010360589, 200 per case
Norton 66254432925 Wheel, 3" X 1/2" X 1/4" Bear-Tex, Rapid Blend, Non-Woven 5 Density, A/O, M Grit, 20 Each
Dynabrade 79440 4" Dia. x 5/8" Center Hole, 60 Grit, Type 29, Ceramic DynaCut Flap Disc, 10/pack
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 27719, Cubitron, II Roloc Durable Edge Disc 984F, 80+, YF-weight, TR, Maroon, 4 in, Die R400BB, 7100006569, 100 per case
3M 01328, Stikit Gold Film Disc Roll, 6 in, P220 grade, 7010308781, 75 discs per roll
3M 22404, Roloc Disc 361F, 80 YF-weight, TR, 3 in, Die R300V, 7000045100
3M 37024, Extra Large Drywall Sanding Sponge 910-DDA, Dual Angle, 2-1/2 in x 8 in x 1 in, Fine, 7010375249 