* Distance(mm) Rockwell Scale: C 0.00 59.60 1.59 56.70 3.17 52.70 4.76 54.30 6.35 57.40 7.94 56.90 9.52 56.90 11.11 58.70 12.70 56.20 14.29 56.50 15.87 56.10 17.46 56.50 19.05 50.90 20.64 55.60 22.22 54.80 23.81 54.50 25.40 53.60 31.75 50.30 38.10 47.10 44.45 44.00 50.80 39.30 63.50 32.10 76.20 34.00