7Pcs Countersink Drill Bit(3-10mm),High-Speed Steel Drill Adjustable Carpentry Reamer Drill Bit Set with One Hex Key Suitable for Wood DIY Drilling Holes

The only thing good was the price. The 2 smallest bits broke. The counter bore could not be tightened enough to stop movement. The bits are round at the chuck end and spin in the drill. They are not good in hard wood or pressure treated. They are almost one-use. Find something better.

A few of the smaller ones have either belt while using, or were not true and straight when I got them, can't be sure, but I can say they're not straight now.. Cheaply made. Doesn't make true round countersink holes.

I bought these drill bits to use at home. These countersink drill bits makes working on wood a lot easier. It combines two steps into one. The bits itself are pretty good and they did the job.

Purchased (23rd April 2019 | £9.99)Worst packaging I've ever seenCheck out my photo to see what I meanThey came in basically a plastic tub with no securings or anything so they are just loose in the boxThe quality of the drill bits themselves are ok, they looked a little tarnished (probably due to the packaging)These aren't for daily use, I don't think they would last very long with prolonged useThe only positives is that it is a complete set from 3mm to 10mm which is useful and they are reasonably priced in my opinion

These are handy but you do have to make sure the allen screw holding the drill bit is tight. It tends to come loose when using the smaller counter sink . all in all a useful set of countersinks.

The grub screw holding the countersink bit onto the drill is very soft, they all stripped and the allen key cannot tighten the bit onto the drill.

Arrived and the plastic case for the bits was smashed. First use of bit and the countersink was spinning, tightened the grub screw tighter and still slipped, had to tighten it so much that it bent the drill bit before getting enough grip to hold oh and the Allen key used for the grub screw snapped on first use. Fine for a couple of uses but if you want something that lasts don’t buy this!

The drill bit for cutting the initial hole was o.k. but for cutting the countersink, sorry to say this but it was terrible, as I've always said, on certain purchases you have to fork out that little bit more for quality!