SPI 30-139-0 Ultra Precision 12-Piece Angle Block Set: 1/4 Degree to 30 Degree

SPI 30-139-0 Ultra Precision 12-Piece Angle Block Set: 1/4 Degree to 30 Degree

• Use these ultra precision angle blocks for production and inspection applications
• Each block is 3 inches long by 1/4 inch thick, made from precision-ground hardened steel
• Angular accuracy of 0.0001 inch, +/-30 arc seconds
• Includes 12 blocks: 1/4°, 1/2°, 1°, 2°, 3°, 4°, 5°, 10°, 15°, 20°, 25°, and 30°
• 12 block set includes fitted case; this set is not serialized and does not include NIST-traceable certification