All of our tweezers are made with hand finished chromium steel. Chromium steel privets great corrosion resistance against most chemicals as well as atmospheric conditions. It can withstand temperature for high heat sterilization. Our special metal has superior wear resistance and maintains the finest point on the market. Each tweezer is counterbalanced to allow for more meticulous lash application. Did we mention each tweezer is hand tested and each grip is on point?