1045#carbon steel heat-treated and polished with ends 42-52hrc surface with painting or spary plastic art no spec material diamertercc2 200mm 45# 16mm,18mm,19mm 250mm 45# 16mm,18mm,19mm 300mm 45# 16mm,18mm,19mmA cold chisel is made from tempered steel which makes it a little harder than other types of chisels and other instruments. This is necessary because it is used to cut through other metals ...