Chisels set to specific Rockwell C scale hardness. Used to compare or confirm hardness on parts either in situations where a Rockwell machine will not work or one is not available. The 8 chisel are set at 50hrc-52hrc 54hrc 56hrc 58hrc 60hrc 62hrc and 64hrc. https://youtu.be/j5EMTdxIzdo
Jun 1, 2018 by TDPurcell
They work perfectly. Way easier and accurate than using a file. Plus you can use them on non flat surfaces where a hardness test couldn’t.