·適用於一般鋼料,HRC 30以下之合金鋼、鑄鐵、鑄鋼等被切削材。·適合一般鑽床、車床、桌上車床之鑽孔加工。·Suitable for drilling General Steels, Alloy Steels withhardness under HRC 30, Cast Iron and Cast Steel, etc.·Suitable for drilling operations on drilling machines,lathes