KENDO 5PCS Countersink Drill Bit Set, High Speed Steel Countersink Bits, 82 Degree 5 Flute Pieces, 1/4 Inch Hex Shank, Fit for Sink Holes into Metals, Wood, Plywood, Plastic with Aluminum Case

Excellent quality and price

I use that at home to install my daughter safety door, work very good on concrete and wood,, speed hole with a nice cut, size are long and nice cover case

My husband likes this rotary hammer drill bits. They are durable. It looks like it’s a good quality. Speed is fine too. So, he likes it. He uses it.

All of the bits at big box stores are terrible, so save money by buying these

Good value and is comparable to home depot ones. Affordable too when on sale!

Not for a journeyman. But for a homeowner needing to drill one hole it’s great.

I was drilling through some brick to install a Ring camera and I went through 5 of these bits and all of them broke at the tip. They are very cheap and I guess you get what you pay for. Just pay the money for a quality drill bit, it’s not worth the hassle and risk

These are great! My last set drilling through masonry didn’t last very long at all. First bit I pulled out of the packet here did the job quickly and easily. No issues, haven’t used them a lot, so I can’t speak to how long they’ll last over time but first use and first impression was very good!

I have a hammer drill for anything to do with concrete but needed a specific size and this set was cheaper than a single bit. I think you're not supposed to use these in hammer mode so I just used the drill and this blew through cinderblocks easily. I did one hole in the concrete floor and it was similar to using a hammer drill.Definitely recommend.