Narwhal 5/8" Drill Bits for Metal (M35 Cobalt - 3 Pack) 6 Inch Length & 135 Degree Split Point for Drilling Into Metal, Hardened & Stainless Steel, Cast Iron, & More!

These bits are working great for me...still using first one and have poked at least 70 holes in thinner stainless in a shipping container. I just poked another 10 holes today and quick easy mounting wire hold downs to dress up the runs. First one not broke and still sharp...not as easy as first hole but still respectable and prob by 100 holes will get to my bit sharpener to prolong the life of the bit and not break by pushing too hard. Great value in my opinion for my needs!

Bought these for a job and I will be buying more! Cuts down on the time I spend drilling with other drill bits. Good quality. Stays sharp when using cutting oil but they will get ate up if you use them hard. Nice storage case and function as designed.

These work great. They seem to last well enough for a small drillbit. We're drilling 18g steel and as long as we're careful we can easily get 100+ holes per bit.

So i thought they were carbide bits but they were cobalt. Doesn't really matter they did a good job of drilling and they come in a nice package so the ones I didn't use aren't floating around my toolbox all willy nilly. Good quality if im in need of another handful of a different size I would consider buying this brand again.

Worked as described, drilled 1/2 inch steel plate, no problem

Pretty good bits I was drilling broken bolts and this worked well... The bit is strong enough to chip and not snap... Glad I bought a 3 pack as the bolts were hard as a coffin nail

Excellent bulk pack, great durability

Bought the 1" diam drill for drilling some steel. Needed something overnight and cheap. Chips only came out of 1 flute while drilling. The cutting edges were visibly different heights. Pretty much the worst factory grind of any drill bit I've ever seen. It barely made it 1 hole and the cutting edge was burnt black. Chips were stuck to it also. This was done with flood coolant FYI. Ran a different brand Amazon bought tool with the same specs and price at the exact same feeds and speeds and that one has done 80 holes without issue.