* Distance(mm) Rockwell Scale: C 0.00 55.40 1.59 51.40 3.17 53.80 4.76 55.40 6.35 56.40 7.94 56.10 9.52 56.00 11.11 54.10 12.70 50.50 14.29 49.60 15.87 50.50 17.46 48.70 19.05 49.60 20.64 49.90 22.22 48.00 23.81 44.80 25.40 42.30 31.75 31.90 38.10 34.40 44.45 31.70 50.80 29.20 63.50 32.20 73.02 34.40