No.72鑽頭（6入裝）

The diamond grit on these bits made quick work of some tough oak, leaving a clean hole. I’ve used them on a few metal pieces too, and they cut smoothly without grabbing. Six bits in the pack feels like a solid value for the price.

I was drilling into some 1/4-inch steel plate for a shelf bracket and the diamond grit on these bits made clean holes without any binding. They're definitely sharper out of the pack than my old set.

These bits cut through a steel bracket in about half the passes I expected, and the fine diamond grit left a surprisingly clean edge. I've used them on wood and plastic too, and they're still sharp after a couple of weeks of projects.