Brand NEW! Ultra-hard black oxide offers long-life and durability Suitable for drilling wood, metal, plastic and fiberglass Designed to ensure quick starts and clean holes Tired of drill bits that dull quickly and snap under the slightest pressure? Then step up to DEWALT Black Oxide Drill Bits. These industrial-grade twist-drill bits are cut from super-hard, resilient black oxide for the ultimate in durability and strength. Each bit features a 135-degree split point for enhanced hole-drilling performance, including quick starts and clean, burr-free holes. For use in wood, metal, plastics and fiberglass. 21-piece set 135-degree split point drills on contact and prevents walking Parabolic flute design improves chip ejection in metal and wood drilling applications Black-oxide coated for greater wear resistance Helix is 31 degrees which minimizes the over aggressiveness of a true parabolic flute - All international buyers are responsible for all tax, duties and/or customs fees.