3/8" Impact Drill Bit, Patented Web Taper Increases The Rigidity Of The Bit To Decrease The Potential For Bit Breakage, Patented Pilot Point Tip 3/16" - 1/2" Allows Users To Drill Holes Faster Than The Conventional Split Point Product & Offers Clean Burr Free Holes With Reduced Bit Walking, Product Is Designed To Be Used In A 1/4" Hex Shank Impact Drivers To Drill Holes In Metal, Wood Or Plastic.