Don?t let dull drill bits slow you down. Drill holes faster and cleaner with Dewalt Gold Ferrous Drill Bits included in this incredible 40pc accessory set (over a $45 value!). These bits drill 25 percent faster and last 70 percent longer than standard twist-drill bits. They?re even designed to reduce annoying lockup, which often occurs when the bit first breaks through the back side of the work piece. For use in wood, metal, plastics and fiberglass. In addition, this set includes the most populr DEWALT Screwdriving Bit Tips which are a perfect complement to your drill/driver, and are designed to meet the demands of working professional contractors. Each bit is cut from shock-resistant tool steel and features an advanced hardening process that greatly reduces wear.