54 series mechanical punches sets with anti-scratch washer.
Standard punches can cut up to 2 mm in steel sheets and 1.5 mm in stainless sheets.
*This is a general recommendation, there is a wide variety of steels and stainless It is advisable to oil the sheet metal well before cutting (e.g. use protoolube). In case of doubt, it is recommended to use the 56 series.