See a letter "A" on your drill bit? You're holding the first and smallest size in the letter-gauge drilling system. Perhaps unsurprisingly, this standardized series runs alphabetically from A to Z. On ...

If you plan on drilling into brick, concrete, or stone, you’re going to need to use a masonry drill bit. These specialty bits have strong carbide tips for boring through hard materials, and wide ...

We may receive a commission on purchases made from links. Perusing the drill bit section of any home improvement store, such as The Home Depot, reveals an array of DeWalt drill bits that can cause one ...

We may receive a commission on purchases made from links. Drill bits come in a startlingly wide array of sizes, shapes, and job-specific types. Most DIYers and repairers will be familiar with the ...

A drill bit is what actually cuts into the rock when drilling an oil or gas well. Located at the tip of the drillstring, below the drill collar and the drill pipe, the drill bit is a rotating ...

Solving a problem a customer experienced when drilling in abrasive rock conditions has led to a groundbreaking new design for drill bits. The resulting Sandvik top center drill bits, which incorporate ...

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Doug Mahoney Doug Mahoney is a writer covering home-improvement topics. He ...