Drill Hog is proud to release the newest technology in step drill bits. These bits are made from Molybdenum M7 steel which has a melting point of 4,753 Fahrenheit! New dual flue design cuts faster and removes more material than a standard single flute. Made to drill through all types of metal, steel, stainless steel, brass, copper, aluminum, cast iron, and more. Proudly made in the USA. Drill Hog includes a Lifetime Warranty to the original purchaser.