Drill America m35 Cobalt Drills are effective in drilling tough, high tensile strength materials like stainless steel, Inconel, and titanium. They have a 135 degree split point tip for self-centering and reducing thrust. Compared to a conventional 118 degree tip, these drills wont go "walking" on you. Drill America m35 Cobalt Drills are manufactured to Aerospace Standard 907 and display high red hardness, permitting speeds up to 30% greater than with conventional M2 high speed steel. These reduced Shank Drills expand the size range capacity of a portable drill chuck. Common flute and overall length for minimal adjustment during tool changes. Drill Bit Set comes in Metal Case. All drill bits have a 1/2" Reduced Shank. Sizes include 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16" and 1"