* Distance(mm) Rockwell Scale: C 0.00 35.86 1.59 54.20 3.17 54.60 4.76 54.80 6.35 55.90 7.94 56.00 9.52 55.50 11.11 56.10 12.70 56.30 14.29 53.50 15.87 53.10 17.46 53.40 19.05 54.10 20.64 54.70 22.22 55.20 23.81 55.30 25.40 54.50 31.75 54.80 38.10 54.00 44.45 56.30 50.80 55.40 63.50 57.00 71.44 51.20