drill hog 115 pc drill bit set cobalt m42 fractional letter number drill hog drill hog is proud to release the newest technology in drill bits. these bits are made from cobalt m42 steel which has a melting point of 2,723 fahrenheit! these bits will drill through the toughest steel like truck frames, stainless steel, farm implements, spring steel, grade 8 bolts, and more!<li> tired of not having the right bit for the job? did you know there are "in-between" sizes between the regular fractional sizes? this complete master drill index solves the problem! this set includes fractional sizes, letter sizes, and number (wire gauge) sizes all on one set!<li> drill hog includes a lifetime warranty to the original purchaser.