You have to choose different drill bits and drilling methods depending on the material you want to work on. Here you will find out what each drill bit is suitable for.Drilling in metal
HSS drill bits with a partially ground tip are suitable for non-ferrous metals. These include aluminium, copper, brass, zinc, iron and non-alloyed steel. Drill bits made of cobalt-alloyed High Speed Steel (HSS-E) or even drill bits with titanium coating are required for stainless steel. They are more expensive than normal HSS drill bits but they enable drilling in special steel without a high level of drill bit wear.