* Distance(mm) Rockwell Scale: C 0.00 45.66 1.59 53.20 3.17 54.60 4.76 36.90 6.35 30.10 7.94 28.70 9.52 27.70 11.11 27.30 12.70 26.60 14.29 25.70 15.87 25.60 17.46 24.80 19.05 25.00 20.64 25.60 22.22 23.80 23.81 22.00 25.40 20.20 31.75 24.70 38.10 19.60 44.45 18.60 50.80 17.10 63.50 15.20 71.44 11.40