KM Tools Tool-less Countersink

Love this one

The first one I ordered, the lift up retaining ring somehow got stuck, to make it worse, it was “stuck” in the exact position I couldn’t access any of the Allen screws to take apart the countersink. So, I bought a new one, since I don’t know what I did the first time, I’m being very careful.

mostly ok, but major flaw

The countersink functions well, mostly. The metal quality of the bits and the cutter is poor. The bit dulled VERY quickly, and a cutter tooth snapped off after about a week of use. More importantly the shank is a non standard size and doesn't work well with most collets I've tried. It will not eject from quick-eject collets like Dewalt's. In fact, it got stuck in an Irwin extension collet and is now permanently attached. I had previously used many bits with that same Irwin collet and it worked perfectly until I used it with this countersink. If the shank were standardized and the metal quality were improved I would enthusiastically recommend this, but as is, I simply cannot. This doesn't feel production ready.

I Tried To Like the Countersink

I watched the videos and heard the tool-less pitch. I wanted it to work better than the Amana product. For $100 CAD plus shipping, I also wanted all three sizes. Here is my review…. The most used and arguably most important adjustment is the depth of the pilot hole. Once I set the depth of the countersink, I don’t change it much. A well set screw head, 1/16” below the surface, doesn’t need to change, unless I want to add a plug. Plugs are Pretty rare for me. Only the countersink depth is tool-less. To the point of the more important but “non-tool-less” pilot hole adjustment…… The pilot drill does not extend past 1” deep. It is too short to use with even a 1.5” screw in hardwood or plywood without expecting the material to split. So I would have to grab another drill to extend the pilot hole!? The tiny Allen screw and key to tighten the pilot drill does not make me expect longevity and is not even close to ease of use. The carbide blades on the countersink cutter are sharp and cut clean; the depth adjustment works well, but the issues with the pilot drill don’t make up for those features. I would like to…but I can’t use this tool.