Gasea 3pcs 1/4 Inch Hex Shank 5 Flute 90 Degree Chamfering Countersink Drill Bit Set 12mm 16mm 19mm

No problem with these. Good product and the job fine.

I had a lot of holes to countersink in marine grade plywood, which my old countersink bit wouldn't touch. The speed of these new bits made the job a doddle. I didn't use the hex shank interchangeability feature of these bits, clamping them instead directly into a cordless drill, with another cordless drill holding the drillbit - very successful. I only used the smallest size countersink bit, as the other two bits are probably too large for my purposes, but good value for money just for 1 anyway! The only reason for 4 stars rather than 5, is I wonder if one could achieve a smooth finish in a different material: for my purposes, the finish was perfectly good, but the ply was tough so it was hard to judge. Pleased.

I needed more countersinks and thought I would give these a try, I lose them constantly and begrudged paying local diy store prices again. These are great quality and work brilliantly I have used them for a few weeks on a few projects now and they are still sharp and work a treat. i would highly recommend them and buy them again for sure.

Good quality

I cannot complain for the price. The edges are not the sharpest but what do I expect for something of this price. I needed something to fit my battery screwdriver with a hex drive to just take the edges of my 3D printed holes and chamfers. I tried it and all 3 work. Can't say anymore.

Great on wood or aluminium. Don't know if they would last on heavier metals.

I liked the quality of these, they seem well made and sharp.

I have been using these on extremely hard old oak. Nice round holes especially with a short burst of reverse to finish off. No idea what they'd be like on metal...but absolutely no complaints about their performance on wood.