* Distance(mm) Rockwell Scale: C 0.00 34.50 1.59 48.70 3.17 48.60 4.76 50.70 6.35 52.80 7.94 54.00 9.52 54.80 11.11 54.30 12.70 54.00 14.29 53.20 15.87 51.20 17.46 49.80 19.05 48.60 20.64 47.00 22.22 46.00 23.81 44.70 25.40 40.30 31.75 35.60 38.10 30.80 44.45 30.70 50.80 28.30 63.50 28.70 73.02 27.80