9/32" Inch Cobalt Drill Bits - 13 Pack of M35 Cobalt Drill Bits with Storage Case - Perfect Drill Bits for Metal, Hardened & Stainless Steel, Cast Iron, and More!

I never thought I would be writing a review for a drill bit however I bought the large pack of these because I had a project needing 192 holes drilled through a layer of 2x8 and then a layer of an assortment of 3/8" and 1/4"steel. I didn't think I would go through the whole pack but I did think I would need several of these however I made it through this whole project with one single person drill bit with no regard for its longevity. I was putting heavy pressure on this with absolutely no cutting oil or time to cool down between drilling and it held up like a champ. It may have been taking another second or two to break through towards the end but I have no doubt it has plenty of life left in it. Definitely would recommend these to anyone, even compared to drill bit sets which I've spent a couple hundred dollars on regardless of price.

Cuts aluminum bar stock like butter

Thru hole for 1/2” EMT

Amazing bit!!! Drilled a 5” deep hole through the center of a piece of grade 5 titanium round stock in one shot without stepping bit sizes. Can’t believe I only needed one bit and it was still sharp afterwards. Lots of cutting fluid but it got the job done amazingly.

Liked item, used to install outdoor lighting