Drill Hog is proud to release the newest technology in drill bits. These bits are made from Cobalt steel which has a melting point of 2723 Fahrenheit! These bits will drill through the toughest steel like truck frames, stainless steel, farm implements, spring steel, grade 8 bolts, and more! This set is known as the "Mechanics Set" because it contains the most popular sizes. Proudly made by Drill Hog USA.