Drills Accurate and Clean Holes in Metal?? Wood and Plastic</br>135Degree split point geometry for fast starts and reduced walking</br>Titanium Nitride (Tin) coating lasts 2.5X longer than non-coated bits</br>Fully ground for easy chip removal and long life</br>High Speed Steel (HSS) construction for added durability and long life</br></br>Product Description</br></br>The Makita Hex Shank Titanium Nitride Bits are designed for use drilling holes with impact drivers or driver-drills. These bits feature a 135Degree split point for faster more accurate starts in a variety of material. Each bit is made from high speed steel and coated with titanium nitride for added durability and a long life.</br><br/>http://www.amazon.com/gp/product/B00PH49Z82