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. The Dewalt black oxide hex shank drill bit set (6-pack) includes a variety of bits to accommodate many drilling applications in both wood and metal. Split-point tips help prevent walking, and a durable coating promotes long life.