* Distance(mm) Rockwell Scale: C 0.00 37.60 1.59 38.40 3.17 46.10 4.76 45.50 6.35 46.50 7.94 49.20 9.52 51.30 11.11 51.90 12.70 52.90 14.29 53.00 15.87 52.30 17.46 51.50 19.05 50.40 20.64 48.40 22.22 46.90 23.81 44.80 25.40 44.20 31.75 38.50 38.10 39.40 44.45 34.70 50.80 27.00 63.50 32.70 76.20 15.90