Machinist Tool Calibration Solid Angle Plate Set 30-60-90 Degree & 45-45-90 Degree, Triangle Angle Block Hardened Steel With Precision Ground Angle Angle Gauge Block Set Angle Range: One 30-60-90 degree block and one 45-45-90 degree block Material: Hardened steel, precision grounding angle for easy installation in tools, production and inspection Angle Range: One 30-60-90 degree block and one 45-45-90 degree block Features: Four holes 11/32 for easy mounting, 9/32 thick High Precision: /- 20 Seconds, 0.0001 per inch Application High Precision: +/- 20 Seconds, 0., 0001 per inch Tib 30-60-90 & 45-45-90 Precision Solid Angle Plates Angle Block Set... Material - Hardened steel, precision grounding angle for easy installation in tools, production and inspection30 degree angle plate measurement - 4 x 3-15/32 x 245 degree angle plate measurement - 3 x 3 x 4-3/8Features - Four holes 11/32 for easy mounting, 9/32 thickHigh Precision - 0., 0001 per inch, +/- 20 SecondsFunction - For setting milling angles or calibrating measuring equipmentPackage - Set contains two angle blocks, one 30-60-90 degree block and one 45-45-90 degree block Precision Machinist Measurement Tool 2Pcs 30/45/60... – Grandado Application: For angle set-ups in tooling, productions and inspection, hardened and precision ground