Drill America - DWDCO43P12 #43 Cobalt Drill Bit (Pack of 12), DWDCO Series

Cut through an FSB and barrel like butter. I think it helps to put a drop of oil down in the hole after getting it started. It held it's edge well enough to drill both holes with a single bit so they're plenty sturdy.

I've been poking holes in stainless for a long time. These will absolutely go through 303 stainless even after you've work hardened it. VERY NICE!

This is what you need for pinned S&W 29 & 500 magnum front sights. I use these for HiViz & Dawson replacement sights which need to be drilled.

These bits are fantastic. They quickly go through 3/16 thick high carbon steel like it's nothing. I use these frequently, and months later, I've only just now needed to pull a 2nd one out of the 12-pack I got. I'll order these again when I need to, but it might be a while.

Five of the eight screws that held the blades of my jointer in place weren't budging, even after applying heat and PB Blaster. The hex key stripped the heads, so I decided to drill through the center of the screws and use a screw extractor. First, I bought cobalt drill bits made by Bosch and Masterforce. The Masterforce snapped in two almost immediately, the Bosch dulled in under a minute. Then I Googled "best drill bits for metal", and the top recommendation was Drill America. Amazon's price was unbeatable, so I ordered a 12 pack. The first two bits dulled on the first screw, the third snapped in two (I blame myself for applying too much downforce), and the fourth bit aggressively drilled through the remaining four screws. In the end, the Drill America bits helped me achieve my goal. If I ever have another tough metal-drilling project, I will definitely rely on drill bits made by Drill America.

I inherited a set of numbered drills from my father. Many of them are dull. I am slowly purchasing replacements for all of them (not in a direct sequence). Hopefully this will be a legacy thing since no one seems to know what a numbered drill set is any more. What more can I say. It was this drill number's month. Only about 50 numbers more and four more years to go to get them all replaced.

A #33 bit should be a shade bigger than a 7/64, but this is just very slightly SMALLER. ie this fits loosely into a hole drilled by my 7/64 bit. Meanwhile that 7/64 fits loosely into a hole drilled by a 33 I have from a different company, as it should. So this seems small by like .1mm

good value

Excelente producto