DeWalt 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.
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