Known for exceptional quality and innovation, The Cermac Caulk uses only the highest quality, high-carbon steel. To ensure consistent high quality, the production tolerances are kept extremely tight. After production, Cermac Caulks are heat treated to a tool steel hardness to provide maximum strength, durability and reliability. One piece construction is done by cold heading and trimming which ensures better durability and eliminates any chance of separation of the logging point and plate.