* Distance(mm) Rockwell Scale: C 0.00 49.83 1.59 34.90 3.17 45.70 4.76 58.50 6.35 54.90 7.94 49.90 9.52 54.70 11.11 58.40 12.70 58.20 14.29 56.90 15.87 53.80 17.46 47.10 19.05 44.20 20.64 42.20 22.22 39.10 23.81 35.70 25.40 33.40 31.75 30.20 38.10 29.40 44.45 34.10 50.80 32.20 63.50 27.90 73.02 17.70