KEWAYO Countersink Drill Bit Set - 4pcs 90 Degree High-Speed Steel Titanium Coated Drill Bits for Wood, Metal, Fiberboard, Plywood, Plastic, PVC - Perfect for Countersinking and Chamfering

These are the countersinks to use if don’t want chattered edges.

These were all worthless , couldn't begin to even cut or shave an edge off of 12L14 soft machineble steel on a lathe .... none of them at any size...I doubt they are even suitable for wood...JUNK! do not buy these trying to save a few bucks ...they are paper weights .... yeah they are cheap for a reason !

I purchased this style as I had seen good results with this type of chapher. Doesn't bite without a lot of pressure. Worked my way through all the bits, none worked satisfactorily.

Not good enough for A36 steel. Wiped the edge off immediately. A waste of money for what I needed.

Will not work on wood. Maybe metal.

Son robustas, pero estan poco afiladas, no hacen el avellanado con facilidad

I bought these for a project I was doing where I needed to countersink some holes in mild steel. These countersinks were useless and wouldn't cut any steel. I had to use a very old and much better made same style countersink I had in the garage to finish the project. This is definitely one of those, you get what you pay for items.

No es de la calidad que esperaba por el precio que pague, realmente no lo recomiendo, sirve perfecto para plásticos más no para madera ni mucho menos metales como aluminio.

Much better than traditional countersink bits. These work absolutely brilliantly.