CNC Machinist Calculator Pro is a machining calculator designed for manufacturing engineers, machinists, CNC operators, tool & die makers, and at home hobbyists. CNC Machinist Calculator Pro is great for CNC programmers or machine operators who need to make quick calculations on the fly. This CNC machining calculator app includes the following features: 1. Turning Calculators for lathe operators 2. Milling Calculators for mill operators 3. Drilling Calculators 4. Gun drilling Calculators 5. Thread Calculators 6. True Position Calculators 7. Bolt Pattern Calculators 8. Surface Finish Calculators 9. Drill & Tap charts10. Thread Pitch charts11. Center drill dimensions12. Unit converter13. Hardness conversions14. G-codes15. M-codes16. Blue Print Geometric Tolerance Descriptors - GD&T17. SFM calculator for drilling, milling, & turning over 170 materials18. Tap Drill Calculator for roll form & cut taps19. Various Geometric calculators20. Triangle Solver21. CNC keyway calculator 22. Custom macro variables, logic, arguments, & arithmetic data23. More to come. We're working to become the best machining app on the marketCheck us out at www.cncdirt.comJust Added added the following: Drilling SFM data can now be calculated based on material hardness.