* Distance(mm) Rockwell Scale: C 0.00 52.60 1.59 56.10 3.17 53.20 4.76 32.70 6.35 26.60 7.94 25.70 9.52 24.00 11.11 23.60 12.70 21.70 14.29 19.00 15.87 19.70 17.46 19.60 19.05 18.80 20.64 20.60 22.22 20.70 23.81 19.80 25.40 17.80 31.75 14.90 38.10 16.10 44.45 9.40 50.80 1.50 63.50 6.00 71.44 14.70