Cobalt Drill Bit Set, 13Pcs M35 High Speed Steel Jobber Length Drill Bit Kit for Hardened Metal, Stainless Steel, Cast Iron, Wood and Plastic, with Index Storage Case, 1/16"-1/4"

I needed a set of drill bits capable of drilling into steel, in this case, a steel gate post. None of the bits I had would bite, despite being a general purpose bit. I ordered these. They arrived quickly and did the job. Be advised that the bits are metric, so if you use inches you may need to do a quick calculation to determine which size bit you need. Personally, I just eyeballed it, comparing the screw and bit visually. That seemed to work just fine. Great price and good quality. I would recommend these to anyone.

I saw some of the one star reviews that said these will barely drill though steel. I tried one out on an old steel industrial bumper jack. It cut fine with a hand drill.Of course they are going to be more brittle than regular HSS. They are M35 cobalt alloy.EDIT: I notice that some of the reviews here are for a different set of bits than I got. Mine is the 13 bit set in the plastic clamshell index box

a) The packaging was acceptable and informative on what was inside. However the plastic used is very flimsy and since the hinge is just the plastic ...I believe it will crack after only a few uses , especially on a cold day.b) The drills themselves are pretty exceptional. Sharp, straight, and easy to remove from the case. Cuts through any wood in a clean and precise manner ( no burrs left behind) . I was certainly impresses when I used one of the smaller bits to drill through an aluminum frame with a steel backing fairly easily. The bit showed a tiny bit of wear but appears to have maintained it edge and surprisingly did not get hot drilling through the metal!

Good price and looks to be of good quality, would recommend this product to others

Say these bits are really good cut through the piece of steel that I had in like 15 seconds no joke.So far highly recommend it

Broke bit after one month with lite usage.Vendor was very responsive and refunded purchase. Move to three stars.

Only used this once so far. Even though it's for wood, I used the tiniest drill bit to make a hole for a picture, and the drill bit didn't break.

Good price and delivery