* Distance(mm) Rockwell Scale: C 0.00 30.93 1.59 54.40 3.17 49.20 4.76 52.00 6.35 52.80 7.94 52.00 9.52 51.60 11.11 53.10 12.70 53.70 14.29 53.80 15.87 53.60 17.46 52.90 19.05 51.50 20.64 51.60 22.22 46.80 23.81 48.30 25.40 49.30 31.75 41.80 38.10 41.90 44.45 38.60 50.80 35.70 63.50 16.40 73.02 1.60