* Distance(mm) Rockwell Scale: C 0.00 60.43 1.59 60.10 3.17 52.70 4.76 55.50 6.35 56.60 7.94 55.70 9.52 57.80 11.11 57.30 12.70 55.70 14.29 53.90 15.87 51.70 17.46 49.90 19.05 43.60 20.64 47.40 22.22 45.70 23.81 44.50 25.40 42.30 31.75 34.30 38.10 37.90 44.45 33.70 50.80 37.00 63.50 34.90 76.20 33.30