Material: HSS
Size: 6-6.5mm,6.5-7mm,7-7.75mm,7.75-8.5mm,8.5-9.25mm,9.25-10mm,10-10.75mm,10.75-11.75mm,11.75-12.75mm,12.75-13.75mm,13.75-15.25mm,15.25-17mm,17-19mm,19-21mm,21-23mm,23-26mm,26-29.5mm,29.5-33.5mm,33.5-38mm,38-44mm,44-54mm,54-64mm,64-74mm,74-84mm,84-94mm
High hardness.