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 3350-75WL, HIGH PRECISION WIRELESS DIGITAL SNAP GAGE, 2-3"/50-75mm, 6940561960372
3M 26109, PPS Series 2.0 Adapter, Type S23, 1/4 Female, 18 Thread NPS, 7100135941
3M 97419, Aluminum Foil Tape 3380, Silver, 48 mm x 45 m, 3.25 mil, 7000049613
3M 16582, Accuspray Atomizing Head, Blue, 1.2 mm, 7010363219
3M 65487, Pro Grade Precision Ultra Durable Universal Hole Sanding Disc DUH560TRI-10I, 5 inch UH, 60, 7100202879, 10 per pack
3M 03123, Pro Grade Precision Edge Detailing Dual Angle Sanding Sponge, 24302TRIP-XFDA, 2-7/8 in x 4.5 in x 1 in, X-Fine, 7100170066 