Cobalt Drill Bit Set (1/16-1/4 Inch, 13PCS), M35 High Speed Steel Twist Drill Bits for Stainless Steel, Hard Metal, Cast Iron, Plastic and Wood

I am grateful for purchasing this product. I keep it inside of my drill bag. They work great on several surfaces.

Good bit's,they cut well

Excellent quality

High quality bits... great price

They are brittle so be careful that's just how cobalt bits are, they won't tolerate bending or biting off more than they can chew. I'm drilling through 4 10.9 hardened steel bolts (seized subframe bolts) I drilled through one so far. Use oil, go slow, push kinda hard, keep it straight and clear the chips and your good. Stop often and add more oil and don't let it get hot.

Not as great as advertised. I tried to drill thru some steel L and the bit would not go through. I use a lot of drilling oil and it didn't matter.

Small, but handy drill bit plastic case. Drill bits are sharp and do the job. Recommend

Ok