BEHAPPY Cobalt Drill Bit Set, 15Pcs M35 High Speed Steel Metal Drill Bit Set, Twist Jobber Cobalt Drill Bit Set for Stainless Steel, Hardened Metal, Iron, Wood,Plastic,Index Storage Case, 1/16"-3/8"

For the price they work great!

I highly doubt a machinist would appreciate these, but for a guy in his garage they are great. They are sharp, accurate, and so far durable. I have broken one of the smaller ones but that was my fault as I did not have the work piece set up correctly. If you are a maker or weekend warrior/shade tree mechanic, these are for you. Would recommend.

They are great but there were two of them broken when I opened the box. They were laying in the bottom of the box.

I bought these to drink through hardened steel after trying countless drill bits with no success. These drill bits drilled through the hardened steel like butter in seconds. Great purchase, especially for the money.

Ive been using these to drill into mild steel. Keep them cool and they cut well.

Had to drill off the head of a grade 8 bolt in my engine compartment, they are hardened so I bought these supposed cobalt bits. The dulled out quickly like high speed steel, using low RPM, cutting oil and pressure. It took 8 of the bits to do the job..

Just received both boxes today. Both missing bits. I checked every aspect of the storage boxes and the packaging. Missing bits no where to be found. Have not used any of them so can’t say to the quality.

This thing comes in a metal box like back in the old days - not a plastic envelope. It actually looks like a little ammo box.29 bits, and they feel really sharp. I ran through a few hardwood planks and it was like butter. I also used one to pre-drill a hole in diamond plating for a self-tapping screw and it just ripped right into it. I like the Cobalt material so far!The price is right for the entry level set, recommended!