* Distance(mm) Rockwell Scale: C 0.00 49.60 1.59 61.20 3.17 61.70 4.76 61.40 6.35 60.90 7.94 60.30 9.52 59.60 11.11 56.90 12.70 56.70 14.29 56.40 15.87 56.50 17.46 57.20 19.05 57.70 20.64 57.00 22.22 56.50 23.81 56.00 25.40 55.10 31.75 55.60 38.10 58.40 44.45 56.30 50.80 55.20 63.50 56.80 72.23 51.40