waltyotur10 Pcs Precision Angle Block 1°, 2°, 3°, 4°, 5°, 10°, 15°, 20°, 25°, 30° Set Precision +/- 20 Seconds Lathes Milling Ground Gauge Angle Calibration Gage Inspection Block Set

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waltyotur10 Pcs Precision Angle Block 1°, 2°, 3°, 4°, 5°, 10°, 15°, 20°, 25°, 30° Set Precision +/- 20 Seconds Lathes Milling Ground Gauge Angle Calibration Gage Inspection Block Set