English tools

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Across
  1. 3. Stiffen
  2. 4. Chip
  3. 5. Pierce
  4. 7. Secure
  5. 11. twist
  6. 14. Use with electricity
  7. 16. Squeeze
  8. 17. Bang
  9. 18. Tighten
Down
  1. 1. fasten
  2. 2. Balance
  3. 6. Puncture
  4. 8. Calculate
  5. 9. Cut
  6. 10. Penetrate
  7. 12. Loosen
  8. 13. Knock
  9. 15. Hold