DeWalt Black & Gold 5/16 in. X 4-1/2 in. L Black Oxide Drill Bit Round Shank

Tired of drill bits that dull quickly and snap under the slightest pressure. 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.
135 degree split point to reduce walking when starting bit
Parabolic flute eliminates the frustration of bit spinning
Quick starts and clean, burr-free holes and for use in wood, metal, plastics, and fiberglass