Jobber Drill Blank: 15/64 in Size-Dia, 3 7/8 in Overall Lg, Bright (Uncoated) Finish

These high-speed steel drill bit blanks come in standard sizes expressed in fractional inches. Fractional inch is the most common trade size used for drill bits. High-speed steel drill bit blanks are the most common choice for creating custom drill bits with precise dimensions to suit a certain application. They are less brittle than cobalt and carbide drill bit blanks.