ATOPLEE Countersink Chamfer Tool,4pcs 90 Degree High Speed Steel Countersink Bits for Wood,Metal, Fiberboard, Plywood, Plastic, PVC,Size 2-5,5-10,10-15,15-20mm

For the woodworking project I used them on, they worked GREAT. The countersink was smooth and round, unlike the fluted ones I've used in the past that left slightly hexagonal holes due to chatter.

Bought Nov, ‘24 to use on wood. Wanted the variety of sizes. NONE of the 4 sizes in this set will cut - period! Evidently made wrong. My old bits (which are pretty much worn out after 20 years of use), still work better - they cut! Disappointed! Should be Zero stars!Sorry…

I've tried flat edged cheap screw countersinks, cut terrible and dull fast. I've tried lots of the type that have the drill bits down the center, always snapping the bit or clogging the point between the bit and the cutting area of the countersink. This style from ATOPLEE does not seem to clogg, doesn't chatter around in a hole, and cuts quite well. I've only used them in various woods so far, but I'm very pleased with the performance. Sight 4 star ding as the machining seems a bit rough and mine had some very light rust spots, nothing that didn't clean up very quickly or effected use. I would buy again, especially if they came out with quick connect to use them in a cordless drill.

Muy buen producto

I would have been very disappointed with the quality of these countersinks if I had paid much more. I will only use them for wood and they will do but they do not cut as nice a hole as some other higher priced countersinks that I have.

This counter sink set comes with most sizes one needs to drill a perfect sink hole. The shape allows for smooth boring and finishing holes

finish product

Used on 2 holes in a soft angle aluminium , after that they became absolutely useless they do not even cut plastic. Of course by the time I used it, I got outside of the return window. I feel bad for the metal that was used to manufacture these.