* Distance(mm) Rockwell Scale: C 0.00 55.80 1.59 55.40 3.17 54.40 4.76 53.40 6.35 52.10 7.94 51.90 9.52 55.80 11.11 56.30 12.70 55.60 14.29 52.10 15.87 51.30 17.46 50.10 19.05 49.90 20.64 47.60 22.22 44.10 23.81 40.60 25.40 37.90 31.75 39.30 38.10 32.00 44.45 29.30 50.80 32.70 63.50 27.30 73.02 28.40