KEO 53512 Cobalt Steel Single-End Countersink, Uncoated (Bright) Finish, 82 Degree Point Angle, Round Shank, 5/16 Shank Diameter, 1/2 Body Diameter

Have been using KEO products for years. Had to hone the cutting edge a little when I got them but that was no big deal. Hope they last me as long as the last set, over 20 years. I’ve used them on all kinds of steel, including 416 stainless.

Great for use on wood. I first drill the pilot hole to the finished size, then use this tool to create a countersink. It cuts the wood very quickly and smoothly. It leaves no chatter marks the way traditional wood countersinks often do.

Works as advertised, smooth clean countering

I have been using the fluted countersink bits - they always left a hexagonal pattern in the countersink when I drilled them. This has been far better- perfectly round and smooth. In my few weeks of use with a cordless drill it’s been fantastic.

I bought this to counter sink screws in a diy closet cabinet build, and I love this thing. I was skeptical of the design at first, but this thing works better than any other countersink I own. Even in situations where I use a different countersink, I give a light pass over the hole with this one to smooth it out or remove burrs. I will never again not own one of these.

It makes a dang fine smooth tapered hole. Have several fanged countersinks in the box; all exhibit steps around the edges. This one, with the sharp circular hole, is a design achievement.

Best counter sink Ive used for counter sinking metal. Didnt think it would last this long but it has long since paid for itself. Would absolutely recommend and repurchase when the time comes. Superior quality. Scoops like ice cream!

Not bad

This thing is SUCH a joy to use! Ive never used a countersink which produces such perfectly smooth, clean and precise results in wood and plastic, every time. Why didnt i buy one of these sooner?!