Crafted from 17-4 heat-treated stainless steel and finished with a premium PVD coating, our P365 manual thumb safety lever is built to resist wear and tear from constant use. Our heat treatment process strengthens the metal's wear resistance, so it performs efficiently when needed most. Its PVD coating adds an extra layer of corrosion resistance for peak performance in all environments from the humidity of concealed carry to the grit of the shooting range.