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 62822, VHB Adhesive Transfer Tape F9460PC, Clear, 24 in x 60 yd, 2 mil, 7000042340
3M 82454, Hot Melt Adhesive 3792 LM Q, Clear, 5/8 in x 8 in, 7000000880, 11 LBS/Case
Insize 6143, DEPTH STOP FOR CALIPERS, 6928640371301
3M 37038, Adhesive Transfer Tape 9672LE, Clear, 27 in x 180 yd, 5 mil, 7000048664
3M 87052, Cubitron II Stikit Film Disc 775L, 180+, 6 in x NH, Linered w/Tab, Die 600Z, 7100075206, 250 per case
3M 26120, PPS Series 2.0 Adapter, Type S28, 17.5 mm Female, 19 TPI
Thread, 7100135956
3M 26140, PPS Series 2.0 Adapter, Type S45, 1/4 Female, 19 Thread BSP, 7100135336
3M 07054, General Purpose Sanding Sponge CP-041-ESF, Single Angle, 2-7/8 in x 4-7/8 in x 1 in, Medium, 7100101551 