Most centerpins are brass and plated with something so it would be best to replace them with SS, imo... If you have the means to do the drilling, by all means drill away. The other options you have would be these replacement pins or send your atty's to Tom. It all depends on what you are replacing the pin on. The ones I have done needed to be ground after installing them to get the heads to the right height. Not very hard to do, but time consuming. Not all that much has to come off. It will save you about $30+ after all is said and done though.