use the steel we recommend for our buttons, it is important to get the right result.
also you can not use stainless steel, it is very hard and the results will not be CORRECT
Recommended steel grades for working with a button;
Germany( DIN,WNr) 1.7223,41CrMo4;
France( AFNOR) 42CD4TS ;
Spain( UNE) 42CrMo4;
England ( BS) 708M40;