Rocks between the ears

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Across
  1. 4. best hold on the route
  2. 6. Jams, not for toast
  3. 7. decimal system
  4. 8. index of height to wingspan
  5. 9. Chris, of spain
  6. 12. safer belay device
  7. 14. skin casualty
  8. 15. convex holds
  9. 17. finger trainer (2wds)
  10. 18. Sport Climbers rack (2wds)
  11. 20. small round holds
  12. 23. post climb descent
  13. 24. controversial in national parks
Down
  1. 1. friction enhancer
  2. 2. ruptures while overcrimping
  3. 3. accension technique
  4. 5. tie off the ____
  5. 6. attache
  6. 10. crimp sans thumb wrap
  7. 11. Boulder Bros safety (2wds)
  8. 13. french name for a flipped wrist
  9. 16. French urban free soloist
  10. 17. double it back
  11. 19. place to climb
  12. 21. protection piece
  13. 22. 5 seconds to top