* Distance(mm) Rockwell Scale: C 0.00 46.60 1.59 49.60 3.17 54.70 4.76 52.70 6.35 52.40 7.94 53.20 9.52 55.00 11.11 55.10 12.70 55.00 14.29 54.80 15.87 52.30 17.46 56.20 19.05 57.10 20.64 56.10 22.22 52.10 23.81 41.20 25.40 52.60 31.75 55.40 38.10 54.50 44.45 54.30 50.80 50.70 63.50 53.10 71.44 43.10