13/64", Titanium, Impact Drill Bit, Patented Web Taper Increases The Rigidity Of The Bit To Decrease The Potential For Bit Breakage, Patented Pilot Point Tip Allows Users To Drill Holes Faster & Offers Clean Burr Free Holes With Reduced Bit Walking, Designed To Be Used In A 1/4" Hex Shank Impact Driver To Drill Holes In Metal, Wood Or Plastic.