Amana Tool 55227 Carbide Tipped 82 Degree Countersink Set with Adjustable Drill Bit Depth Stop and No-Thrust Ball Bearing 3/8 Dia x 1/8 Drill Dia x 1/4 Inch Quick Release Hex Shank

The tool is very well made, high quality and a joy to use. Precise adjustment and uniform quality of results, and a huge time saver for consistent screw sets.Pricey, but delivers what it promises, and you will probably only ever need one.

Well worth it! Saves time and improves accuracy. I purchased a bunch of other countersinks before buying this Amana Countersink. The others found their way to the trash after quickly breaking or giving very disappointing results. The build and material quality of this tool are top notch. Its separately adjustable drill bit and countersink depths let me make perfect and repeatable countersink holes quickly.

Love this tool... Glad I bought it

It works great 👍

This is the best i have used when doing lots of screws in a row this gets every one perfect.

Works great except I the lowest setting for the countersink was still a bit too deep. Wish I could adjust a bit more. other than that, worked great.

I've only used this for a few holes, but thought I would share my initial opinion. I've used several countersinks on wood screws and I'm primarily concerned with how smooth the outer edge of the hole is and how repeatable the countersink depth is. I have tried the Snappy, the cheap Ryobi, and a few others.The best I have found until now are sold by Lee Valley and made by an Israeli company. With this product I obtained clean holes with no edge breakout on pine plywood. I looked at the package and it says "made in Israel". I suppose Amana has a deal with the same company. I did not test counterboring as you would for a plug covering the screw. No scratching of the surface as the collar does not rotate. If you adjust the depth stop, you have a perfect hole that just fits the screw head every time.The only downside to this product is that the collar completely blocks your view of the progress of the countersink. You are drilling blind at this stage unless you can move your head down to see under the workpiece. Just takes some getting used to. The depth is controlled by the collar, so you don't really need to see what's happening. You do need to really slow down the drill as the countersink portion is engaged. In general, countersinks like to cut slow if you want a smooth edge. I try for about 200 RPM for a countersink of this size.If you don't want to spend the money on this, a pretty good hole can be obtained with the Ryobi set AFTER you hone both sides of all the cutting edges. An Ez-lap or similar DMT tool or small sharpening card is good for that. (and they are diamond grit, so they will also sharpen this countersink if you drill enough holes to dull it)This countersink product series includes several drill diameters. This one will clearance drill for the threads on a #8 modern wood or deck screw. Consider the screws you are going to use and whether they have a relieved shank that will extend through the top workpiece. I will probably buy a 1/8" one for that case.Also, I learned that wood screws, at least the GRK brand, are 90 degree heads. Sheet metal screws and machine screws to imperial (U.S.) standards are 82 degrees. Machine screws for very thin parts (aircraft or electronics sheet metal) are sometimes 100 degrees. Amana offers 82 and 90 degree versions.If you are using a drill press, very good results in wood can be obtained with a machinist's zero-flute Weldon countersink set. They are HSS and must be sharpened occasionally with a small stone in a moto-tool or die grinder. Those will not counterbore for a plug, only countersink. Machinery suppliers also sell one-flute countersinks that will do pretty good, and solid carbide countersinks. Hand drilling with the common six-flute hardware-store countersinks either leads to burning through the wood since they are not sharp, or more commonly wobbling in the hole and chattering.If you've read this far, you are now a countersink expert...Edit: If your collar is turning after contact, try light machine oil under the retaining ring. Made a difference for me.

I was apprehensive in ordering this as I have lots of counter sink bits and have never had any major trouble eye-balling a good depth the sink screws, however this tool takes all of that guess work out of it and counter bores to a predetermined depth every time. I haven't used any of my old counter sink bits since receiving this. Well worth the money.