* Distance(mm) Rockwell Scale: C 0.00 31.60 1.59 53.90 3.17 46.80 4.76 44.40 6.35 44.60 7.94 47.30 9.52 45.30 11.11 44.50 12.70 50.20 14.29 50.50 15.87 50.80 17.46 50.80 19.05 48.40 20.64 45.10 22.22 45.20 23.81 44.50 25.40 42.70 31.75 38.20 38.10 34.50 44.45 36.10 50.80 33.60 63.50 35.60 71.75 28.40