15/64", Turbo Max Drill Bit, Fractional Straight Shank, Self Centering Tip For Clean Fast Starts, Jet Point For Clean Entry & Faster Drilling, Stays Sharp Longer, High Speed Steel Features A Black Body & Gold Flute, 3 Flatted Shank On 3/16" & Above For Better Chuck Grip, Drills More Holes & Drills Faster, 135 Degree Split Point.