HPHOPE 1/8, 3/16, 1/4, 3/8 Inch Cobalt Drill Bits

Work fine.

I was surprised that it was so easy to buy these bits in bulk from Amazon. The bits are strong and sharp and fit my needs. Shopping at Amazon made this purchase a breeze. As a prime member I didn't have to pay the exorbitant shipping fees the industrial suppliers charge.

Very sharp

Needed to drill 24 holes into 14 gauge stainless steel for a commercial computer installation job. Figured I'd just have to burn through a pack of these to get done. What a surprise to find that not to be the case. I needed only one bit to do the entire job and that bit is even ready to do more work. These are way better than I expected them to be. Considering the cost, this is a lot of bang for your buck. Great tool. Very happy with the purchase.

Seems good

I had many holes to drill in angle iron (1/8" thick) for trailer planks. I was pleasantly surprised that I only need two out of the entire pack.

I purchased these to drill out a lug nut. Not sure the relative hardness of lug nuts, but none of my other drill bits were making any progress and were going dull in the process. These bits cut through lug and hold up well. You have to find the right speed, use a little WD40, and be patient and persistent. The drill bit didn't look that much worse for wear when done

Worked for me like the ones that are longer.