* Distance(mm) Rockwell Scale: C 0.00 64.70 1.59 62.00 3.17 60.90 4.76 60.80 6.35 60.60 7.94 60.30 9.52 60.40 11.11 60.30 12.70 60.10 14.29 59.80 15.87 59.50 17.46 59.40 19.05 59.70 20.64 59.40 22.22 59.40 23.81 59.00 25.40 59.00 31.75 57.70 38.10 56.30 44.45 53.80 50.80 50.90 63.50 46.60 71.44 45.40