Titanium nitride coating turns 18-inch drill bits into wood-boring, plastic-shredding, metal-cutting dynamos. All brands' bits look the same, but which one bores the best hole? To find out, we ...

Cobalt bits are the way to go. The titanium-nitride coated bits (it's not just straight titanium coating) are really designed more for CNC use where lots of closely controlled holes are drilled.

Using the common ¼-inch Jobber-length drill bit as a benchmark for DeWalt drill bit pricing at Lowe's, the Black and Gold DeWalt drill bits are the least expensive at $5.48 compared to $8.48 for ...